Browse all questions
The figures these questions turn on, laid out by section on dense colour pages you can print: CSLB Law & Business cheat sheet PDF — $9.99 →
Every question with its answer and explanation — study by topic or all at once.
Insurance & Liens
198 questionsThe two remedies chase different assets. A mechanics lien under §8400 attaches to the real property itself, in the amount §8430(a) fixes — the lesser of the reasonable value of the work and the price agreed — and it is enforced by an action brought within 90 days of recording under §8460(a). A stop payment notice goes after money instead: §8520(a) lets a claimant with lien rights other than the direct contractor give the notice to the owner, §8530 lets it go to the construction lender, and §8500 makes this chapter the exclusive route to the construction fund, so nobody may assert any other legal or equitable right against that fund except under a written contract with whoever holds it. (a) has it exactly backwards, and invents a lien against a licence, which does not exist in any form. (b) ignores that the deadlines differ as well as the targets — §8412 and §8414 govern recording a lien and say nothing about giving a notice. (d) invents a substitution: payment ends both remedies, and neither one converts into the other.
Civil Code §8400; §8430(a); §8500; §8520(a); §8530; §8412; §8414; §8460(a)§8416(a) lists what a claim of mechanics lien must contain, and every item is about the claim itself: a statement of the claimant's demand after deducting all just credits and offsets, the name of the owner or reputed owner if known, a general statement of the kind of work furnished, the name of the person who employed the claimant or to whom it furnished work, a description of the site sufficient for identification, the claimant's address, a completed proof of service affidavit, and the NOTICE OF MECHANICS LIEN in at least 10-point boldface type — the whole statement signed and verified by the claimant. Nothing in it calls for the owner's loan details, so (a) is invented; nothing calls for other subcontractors' licence numbers, which is (b); and the contract is evidence rather than a lien requirement, which is (c). §8410 is the separate condition that trips claimants up: a lien is enforceable only where the preliminary notice was given and proof of it made.
Civil Code §8416(a); §8410§8416(e) says it flatly: failure to serve the copy of the claim of mechanics lien as the section prescribes, including the Notice of Mechanics Lien required by §8416(a)(8), causes the claim of lien to be unenforceable as a matter of law. Recording is only half the job, which is (a)'s error. §8416(c) sets out how service is made — registered, certified or first-class mail evidenced by a certificate of mailing, addressed to the owner or reputed owner at a residence or place of business, or at the address shown by the building permit, or as §8174 otherwise provides — and if the owner cannot be served that way, the copy may go to the construction lender or to the original contractor instead. §8416(d) makes service complete when the mail is deposited, which is why the proof of service affidavit required by §8416(a)(7) appears on the face of the lien itself. (c) and (d) invent conversions no section provides: a stop payment notice is a separate remedy the claimant must give for itself, and a money judgment only ever comes from a court.
Civil Code §8416(a)(7)-(8), (c)-(e); §8174Stop payment notices on private projects must be served within the same outer deadlines that apply to mechanics' liens: generally within 90 days after completion or cessation of the work of improvement if no Notice of Completion or Cessation is recorded. Recording such a notice shortens these deadlines.
Civil Code §8520Civil Code §8200 requires every claimant other than the direct contractor and wage laborers to serve the owner, the direct contractor, and the construction lender not later than 20 days after first furnishing labor, service, equipment, or materials; §8204 lets a late notice stand but limits the claim to the 20 days before service and afterwards. (a) leaves out the two recipients whose omission costs the most — without the lender there is no bonded stop payment notice. (c) reverses the sequence, since a notice of completion starts the lien clock rather than the notice clock. (d) uses 90 days, which is the §8412 deadline for recording the lien, not for serving the preliminary notice.
Civil Code §8200 / §8204(a)Under Civil Code §8412, a direct contractor must record its mechanics' lien within 90 days after completion of the work of improvement. If the owner records a notice of completion or cessation under §8182, the direct contractor's window is shortened to 60 days after that recording (§8412), and a subcontractor/claimant's window is shortened to 30 days. The 90-day fallback applies when no NOC is recorded. A 1-year window confuses lien recording with the §8460 deadline to foreclose on a recorded lien (90 days to file suit).
Civil Code §8412Civil Code §8460 requires a claimant to commence an action to enforce a recorded mechanics' lien within 90 days after the lien is recorded; otherwise the lien expires and is unenforceable. The claimant and owner may extend the deadline by written agreement under §8460(b), but only to up to one year from completion. The 180-day option does not exist. The 1-year-from-award and 4-year statute options confuse breach-of-written-contract limitations with the much shorter mechanics'-lien deadline. Missing this 90-day window is one of the most common ways subcontractors lose lien rights.
Civil Code §8460§3700 requires every California employer to secure the payment of compensation, and it allows exactly two ways to do it: a policy from an insurer admitted to write workers' compensation in this state, or a certificate of consent to self-insure issued by the Director of Industrial Relations. Failing to do it is a misdemeanour under §3700.5, and the money is serious — §3722(a) assesses $1,500 per employee employed at the moment a stop order issues, and §3722(b) assesses the greater of twice the premium the employer should have paid or that same $1,500 per employee for the period it went uninsured. On the licensing side, B&P §7125 requires a licensee with employees to keep a current certificate on file (until January 1, 2028 a licensee with no employees may file an exemption unless it holds a C-8, C-20, C-22, C-39 or D-49 classification; from that date only a §7029 joint venture with no employees is exempt), and §7125.2 suspends the licence by operation of law from the date coverage was required. (b) is a payroll tax form, (c) is the separate insurance §7071.19 requires of an LLC, and (d) is federal law with a 50-employee threshold.
Labor Code §3700; §3700.5; §3722(a)-(b); Bus. & Prof. Code §7125; §7125.2; §7071.19A §7029 joint venture with no employees may hold an exemption today, and from January 1, 2028 — when the SB 216 version of §7125, postponed from 2026 by SB 1455, takes effect — it will be the ONLY licensee that can; until then other no-employee licensees outside the C-8, C-20, C-22, C-39 and D-49 classifications may file one too. §7125.4 then makes that exemption void by operation of law the moment an employee is hired, and the license is suspended unless a Certificate of Workers' Compensation Insurance is on file. There is no grace period to shop for a policy (d), no waiting for renewal (c), and nothing about this requires surrendering the license (b).
Bus. & Prof. Code §7125 (as amended by SB 1455, Stats. 2024, ch. 485); §7125.4; §7029The 20-day clock in Civil Code §8200 runs from the date the claimant FIRST FURNISHES labor, service, equipment, or materials — here July 1, so service by about July 21 protects the full claim; §8204 lets a later notice stand but limits recovery to the 20 days before service and afterwards. (b) keys the deadline to the paperwork rather than the delivery, which is the most common and most expensive supplier error, because invoices often go out weeks later. (c) uses a recording date that concerns lien priority, not notice. (d) borrows a notice of commencement from other states; California's scheme uses completion and cessation, not commencement.
Civil Code §8200 / §8204Want these explained in order? CSLB Law & Business — Complete Study Guide (2026) — PDF + EPUB, $24.99 · 14-day refund →
Civil Code §9358 obliges the public entity served with a stop payment notice to withhold, from money still owed on the contract, an amount sufficient to answer the claim plus a reasonable allowance for litigation costs, and it is protected when it withholds in good faith. (a) skips the judgment a creditor needs before levying on an account. (b) asks for a remedy the notice does not carry — the contract continues, only the money stops. (c) is the trap the public-works scheme exists to answer: public property cannot be liened, which is why the legislature substituted this notice and the §9550 payment bond.
Civil Code §9358 / §9350 et seq.§8424(b) fixes the bond at 125 percent of the claim of lien — or 125 percent of the amount the claim allocates to the property being released — and requires it to be executed by an admitted surety insurer. On recordation the real property is released from the lien and from any action to enforce it, and the 25 percent margin is there to cover the interest and costs the claimant may recover. The party who records the bond must give the claimant notice with a copy of it, and the claimant then has six months from that notice to sue on the bond, which is a different clock from the 90 days §8460 allows for suing on the lien itself. So (d) is 25 points short, (b) invents a discount for a disputed lien, and (a) is wrong twice over: cash is not required and a surety bond is exactly what the section calls for.
Civil Code §8424(b)-(d); §8460(a)B&P §7071.11(a) is explicit: if the bond is insufficient to pay all claims in full, its sum is distributed to all claimants in proportion to the amount of their respective claims. The same subdivision caps the surety's aggregate liability on wage and fringe-benefit claims at $4,000, so the framer cannot draw more than that from the bond however large the wage claim. (a) is the widespread belief that the bond is a consumer-priority fund — §7071.5 does list homeowners among the beneficiaries, but being a beneficiary is not the same as having priority. (c) applies a first-in-time rule the section does not use. (d) is the most tempting wrong answer, because the section does single out wage claims — but it caps them, it does not prioritise them.
Bus. & Prof. Code §7071.11(a)Civil Code §2782.05 voids or limits provisions that require a subcontractor, or its insurer, to insure or indemnify a general contractor or owner for that party's own active negligence, so the endorsement responds to the prime for liability arising out of the sub's work and its share of fault, and the sub's insurer must still defend as to those claims. (a) overstates the statute: the endorsement is limited, not abolished, and additional insured coverage is standard on California jobs. (b) is the very obligation §2782.05 removes. (d) is the belief that the endorsement is a blanket — it is not, and the prime's own policy answers the prime's own negligence.
Civil Code §2782.05Civil Code §8400 gives a lien right to a person that provides work authorized for a work of improvement, and lists the direct contractor, subcontractor, material supplier, equipment lessor, laborer, and design professional; §8404 defines authorized work as work requested or agreed to by the owner, or authorized by a direct contractor, subcontractor, architect, project manager, or other person having charge of part of the work. The framing subcontractor is squarely inside that. (b) is the limit that matters: a creditor who contributed nothing to the improvement, such as the contractor's landlord or lender, has no lien. (a) and (c) shrink the class to a single tier, which would leave every subcontractor and supplier without the remedy the chapter was written for.
Civ. Code §8400 / §8404Civil Code §8412 gives a direct contractor 90 days after completion of the work of improvement to record a mechanics lien when no notice of completion or cessation has been recorded. The shorter deadlines apply only after such a notice is recorded.
Civ. Code §8412Under Civil Code §8414, once a notice of completion (or cessation) is recorded, a claimant other than the direct contractor must record its lien within 30 days. The direct contractor gets 60 days after that notice. Absent any such notice, everyone has 90 days after completion.
Civ. Code §8414Civil Code §8414 gives the direct contractor 60 days after recording of a notice of completion or cessation, while all other claimants get 30 days. If no such notice is recorded, all claimants have 90 days from completion under §8412.
Civ. Code §8414Civil Code §8204(a) says a claimant who did not give preliminary notice is not precluded from giving one later, but is then entitled to record a lien, give a stop payment notice, or claim against a payment bond only for work performed within the 20 days before service, and at any time afterwards. (a) is the harshest misreading — late notice costs the early work, not the remedy. (c) is the mildest, and it ignores the look-back altogether. (b) invents a doubling of the period; nothing in the section extends the 20 days, which is why the practical rule is to serve at the start of every job.
Civ. Code §8204(a)Civil Code §8200 requires a claimant without a direct contract with the owner to serve the preliminary notice on the owner or reputed owner, the direct contractor, and the construction lender if there is one; §8204 makes the notice reach back only 20 days, so late service shortens what can be claimed. (b) omits the owner, whose property the lien attaches to. (c) omits the lender, and that omission specifically costs the claimant the bonded stop payment notice against undisbursed loan funds. (d) confuses the preliminary notice with recording — the preliminary notice is served, not recorded, and serving only the party upstream of you is the most common fatal error.
Civil Code §8200 / §8204Civil Code §8200(e)(1) excuses a laborer from giving preliminary notice, and §8200(e)(2) excuses a claimant with a direct contractual relationship with the owner from notifying anyone but the construction lender. §8024 defines laborer as a person who, acting as an employee, performs labor on or bestows skill on a work of improvement, and extends the term to a fund owed part of that compensation. (a), (b) and (c) all lack an owner contract, so each must serve the owner, the direct contractor, and the lender within the §8204(a) 20 days — and an equipment lessor is the one people most often assume is exempt, when §8400(d) gives it a lien right on exactly the same conditions as anyone else.
Civ. Code §8200(e) / §8024Civil Code §8200(e) excuses a direct contractor from serving the owner — the contract itself gives the owner notice — but the direct contractor must still give the preliminary notice to a construction lender to preserve rights against the construction funds. (a) inverts the flow: notice runs up the chain toward the people who control the money, not down it. (b) applies the general rule without reading the exception, and is the trap for anyone who memorised '20 days' alone. (c) over-reads the exception, which covers only the owner and not the lender.
Civil Code §8200(e)Once paid, the claimant records a release of the mechanics lien, and that recorded release is what clears the lien from title. An owner who cannot obtain one has two statutory routes: record a lien release bond of 125 percent of the claim under §8424, which shifts the claimant's remedy from the land to the bond, or, once the claimant's 90 days under §8460 have run without an action, petition for a release order under §8480. (b) is a completion event under §8180(a)(4), which starts deadlines rather than ending a lien. (c) is the §8444 notice an owner who did not contract for the work posts and records within 10 days of learning of it. (d) is the §8200 notice served at the outset to preserve lien rights.
Civ. Code §8424 / §8480 / §8444Civil Code §8460 requires the claimant to commence an action to foreclose the mechanics lien within 90 days after recording. If no suit is filed in time (absent a recorded extension), the lien expires and is unenforceable.
Civ. Code §8460A stop payment notice under Civil Code §8500 et seq. directs the owner, or a bonded notice directs the construction lender, to withhold money not yet paid out and hold it against the claim; §8534 sets the owner's duty to withhold. (a) confuses two securities — a claim on the §7071.6 license bond is made against the surety, not through a stop payment notice. (b) describes the mechanics lien, which attaches to the property itself; the point of the stop payment notice is that it reaches the money instead. (c) assumes a levy right that only a judgment creditor has.
Civil Code §8500 et seq. / §8534Civil Code §8532 obligates a construction lender to withhold only on a bonded stop payment notice, accompanied by a surety bond of 125 percent of the claim; the bond protects the lender if the claim turns out to be bad. (a) is the closest trap: form and verification matter, but no amount of formality substitutes for the bond. (b) reverses the order — the notice works without going to court, which is why it is useful. (c) borrows mechanics lien practice, where recording is the operative act; a stop payment notice is served, not recorded. A notice to the owner under §8534 needs no bond.
Civil Code §8506 / §8532A payment bond guarantees payment down the chain: §8608 gives the right of recovery to claimants who provided work to the direct contractor, directly or through one or more subcontractors, and §8612 conditions the claim on the preliminary notice the lien law requires. (a) and (b) both describe a performance bond, which answers to the owner for completion and quality — the two bonds are usually bought together and confusing them is the classic error. (c) is not a bonded obligation at all; financing costs are the owner's own.
Civ. Code §8608 / §8612Labor Code §3700 requires every employer to secure the payment of compensation, by insurance or by a certificate of consent to self-insure, and one employee triggers it; B&P §7125 then makes a current certificate of workers' compensation insurance or of self-insurance on file with the board a condition of the license itself. A licensee with NO employees may file an exemption statement instead until January 1, 2028, unless it holds a C-8, C-20, C-22, C-39 or D-49 classification; from that date SB 216, as postponed by SB 1455 (Stats. 2024, ch. 485), requires coverage of every licensee except a §7029 joint venture that employs nobody. General liability, commercial auto, and builder's risk are routinely required by contract, by a lender, or by the Vehicle Code for the vehicles themselves, but none of them is made mandatory for contractors by the license law, and none of them pays an injured worker's benefits.
Lab. Code §3700 / B&P Code §7125 (as amended by SB 1455, Stats. 2024, ch. 485)B&P §7125(b), as amended by SB 1455 (Stats. 2024, ch. 485), lets a licensee with no employees file an exemption statement instead of carrying coverage — but only if it does not hold a C-8, C-20, C-22, C-39 or D-49 classification. A roofer is on that list, so the C-39 holder must carry workers' compensation or a certification of self-insurance even with nobody on the payroll (d). (b) is the rule for a painter or a Class B contractor with no employees, and it is the trap here: the classification is what decides it. The list stops mattering on January 1, 2028, when the SB 216 version of §7125 becomes operative and every licensee must carry coverage except a §7029 joint venture with no employees — the roofer's answer is the same either way. (a) and (c) name real policies that cover other risks: general liability answers to third parties, builder's risk to property damage during construction, and neither substitutes for workers' compensation.
Bus. & Prof. Code §7125(b) (as amended by SB 1455, Stats. 2024, ch. 485)Commercial general liability answers for bodily injury and property damage suffered by third parties and arising out of the contractor's operations or completed work, together with the duty to defend those claims. (a) is business income coverage, and a liability policy insures what the contractor owes others rather than what the contractor failed to earn. (b) is workers' compensation, which the CGL expressly excludes. (c) is first-party property coverage — inland marine or a tools floater. Note too the 'your work' exclusion: the CGL does not pay to redo the contractor's own defective workmanship.
—Builder's risk is property insurance on the structure and the materials while the project is under way, against perils such as fire, theft, vandalism, and wind; it insures the work itself, and it ends when the project is finished. (b) is the owner's permanent property and liability program, which takes over at occupancy. (c) is commercial general liability, which answers for third-party bodily injury and property damage. (d) is workers' compensation. The line to hold is property coverage on the work versus liability coverage for harm to others.
—A certificate of insurance is an informational snapshot: it says that a described policy was in force when the certificate was issued, and it neither amends the policy nor creates rights. (a) is the single most expensive misconception in construction risk transfer — additional insured status comes from an endorsement to the policy, and the certificate merely reports it. (b) reads the 'cancellation notice' box as a promise; most modern certificates disclaim any duty to notify. (c) mistakes the summary for the contract; only the policy and its endorsements grant coverage.
Additional insured status extends the subcontractor's coverage to the prime for liability arising out of the subcontractor's operations, so the sub's insurer may owe the prime a defense and indemnity for those claims. (b) is the dangerous error: the coverage reaches only the sub's work, is capped by the sub's limits, and is subject to the sub's exclusions, so the prime's own exposures remain uninsured. (c) confuses being insured with owning the policy — the subcontractor buys it, controls it, and can let it lapse, which is why the prime asks for the endorsement and for notice of cancellation. (a) has nothing to do with the endorsement.
—Suretyship involves three parties — principal, obligee, surety — and the surety guarantees the principal's obligation to the obligee, with a right of indemnity back against the principal. Insurance is a two-party transfer in which the insurer absorbs the insured's fortuitous loss and does not seek reimbursement. (b) describes insurance and labels it a bond, which is why contractors are surprised when a surety pursues them after paying a bond claim. (c) simply reverses the two definitions. (d) reverses who gets paid: the bond pays the obligee, and liability insurance defends and indemnifies the insured.
An indemnity or hold-harmless clause reallocates liability: the indemnitor promises to answer for, and usually to defend, specified claims that would otherwise fall on the indemnitee. It is a contractual device, normally backed by insurance, and it is bounded by Civil Code §2782, which voids indemnity for the promisee's own sole negligence or willful misconduct, and by §2782.05, which restricts a subcontractor's indemnity of a general contractor's active negligence. (a) describes a delay or liquidated damages clause. (b) inverts the usual pairing, since a promise to indemnify is only as good as the indemnitor's balance sheet, which is why insurance is required alongside it. (c) belongs to the lien law and cannot be achieved by an indemnity clause.
Civ. Code §2782 / §2782.05Civil Code §8416 requires the claimant to serve the owner with the lien and the statutory Notice of Mechanics Lien, and to record a proof of service affidavit with the lien; without it the lien is unenforceable. (a) is the most attractive wrong answer and fails on two counts — the preliminary notice is served rather than recorded, and it is not attached to the lien. (b) confuses proof of the debt with the recorded claim; the contract is evidence in the foreclosure action, not a recording requirement. (d) has no place in the lien statute at all.
Civil Code §8416Civil Code §8416 conditions enforceability on serving the owner or reputed owner with a copy of the lien and the statutory Notice of Mechanics Lien, and recording a proof of service affidavit with it. (a) borrows the §8460 deadline and shrinks it — the claimant has 90 days after recording to sue, not ten. (c) reverses who bonds: the 125 percent bond under §8424 is the owner's tool for clearing the lien from title, not a claimant's prerequisite. (d) would make the lien consensual, which defeats its purpose as a statutory security a claimant can assert without the owner's agreement.
Civil Code §8416Civil Code §8444(a) lets an owner of the property, or a person claiming an interest in it, that did not contract for the work of improvement give notice of nonresponsibility; it must be signed and verified, state the nature of the owner's title or interest, name any purchaser under contract or lessee known to the owner, and state that the person giving it is not responsible for claims arising from the work. §8444(e) is the trap: the notice is ineffective unless, within 10 days after the owner learns of the work, the owner BOTH posts it on the site and records it. (a) and (b) are claimants' instruments, not an owner's. (c) is the owner's completion filing, which shortens the deadlines in §8412 and §8414 but disclaims nothing.
Civ. Code §8444Under Civil Code §8444, an owner must post the notice of non-responsibility in a conspicuous place on the property and record it within 10 days after first having knowledge of the work of improvement to disclaim responsibility for liens.
Civ. Code §8444Civil Code §8180 defines completion to include actual completion, occupation/use plus cessation of labor, acceptance by the owner, or cessation of labor for 60 continuous days. Merely mailing a final invoice is not a statutory completion event.
Civ. Code §8180Under Civil Code §8188, an owner may record a notice of cessation after labor has ceased for a continuous 30-day period. Recording it shortens the lien-recording deadlines for claimants (30 days for others, 60 for the direct contractor), similar to a notice of completion.
Civ. Code §8188In a surety bond, the principal is the party whose obligation is guaranteed (e.g., the contractor). The obligee is the party protected (e.g., the owner or public agency), and the surety is the company issuing the bond and guaranteeing the principal's performance.
The obligee is the party for whose benefit the bond is written and who may make a claim if the principal fails to perform. On a public works performance bond, the public agency is the obligee; on a payment bond, unpaid subs and suppliers are protected.
Civil Code §8424 lets an owner, contractor, or anyone with an interest record a surety bond of 125 percent of the lien to free the title; the claimant's remedy then runs against the bond instead of the property. (b) points the wrong direction — a stop payment notice is a claimant's remedy that traps funds, not an owner's tool for clearing title. (c) is a real instrument with a real effect on deadlines under §8414, but it does nothing about a lien already recorded. (d) addresses work ordered by a tenant or other non-owner, and cannot remove a lien that has already attached.
Civil Code §8424Civil Code §8204(a) requires the preliminary notice to be given not later than 20 days after the claimant has first furnished work on the work of improvement, and a claimant who gives it later may claim only for work provided within the 20 days before service and afterwards. (d) is the most attractive wrong answer, since a subcontract is often signed weeks before anyone mobilizes and the statute counts furnishing rather than signing. (c) reverses the purpose of the notice, which is served before there is any payment problem. (a) confuses the two instruments: the notice comes first, and §8410 makes it a condition of enforcing the lien that is recorded later.
Civ. Code §8204(a)Additional insured status gives the upstream party defense and indemnity under the downstream party's policy for claims arising out of that party's work, and the certificate documents that the coverage was placed. (a) is the dangerous version of the idea: risk transfer supplements the general contractor's own coverage and never replaces it, and its own insurer will still be looking at the claim. (b) mixes insurance with lien priority, which is fixed by the mechanics lien statute and not by an endorsement. (c) crosses two lines of coverage — employee injuries are handled by each employer's workers' compensation policy, which additional insured status does not touch.
Labor Code §3706 lets an employee of an employer that failed to secure the payment of compensation bring an action at law for damages as if the workers' compensation division did not apply, and §3708 presumes the injury was a direct result of the employer's negligence, places the burden of rebutting that on the employer, and strips the defenses of contributory negligence, assumption of risk, and negligence of a fellow servant. §3700.5 adds misdemeanor exposure. (a) invents a recovery fund California does not maintain for contractors, which is why the §7071.6 bond matters. (b) is the exclusive-remedy bargain the employer forfeits by going uninsured. (d) inverts the consequence of being uninsured.
Lab. Code §3706 / §3708 / §3700.5B&P §7125.2 suspends the license automatically, by operation of law, effective on the earlier of the date the coverage lapsed or the date coverage was required to be obtained; work performed during the suspension is unlicensed work, with the §7031 collection bar and disgorgement exposure that follows. (d) borrows the 90 days from §7071.7, which lets the Registrar accept a BOND as of its effective date if it arrives within 90 days — there is no such grace period for insurance. (b) is the no-harm-no-foul belief, and the suspension does not wait for an injury. (c) is not a remedy anywhere in the chapter.
B&P Code §7125.2(a)Having no direct contract with the owner, the supplier falls under Civil Code §8200 and must serve the owner or reputed owner, the direct contractor, and the construction lender if there is one. (a) is the error suppliers actually make — notifying the customer they invoiced, which preserves nothing. (b) stops one link short of the owner, and the owner is the party whose property is at risk. (d) is incomplete in the way that costs the most: without notice to the lender the supplier loses the bonded stop payment notice against undisbursed loan funds.
Civil Code §8200A performance bond runs to the obligee — usually the owner or the public entity — and guarantees performance of the contract; if the contractor defaults, the surety may complete the work itself, tender a replacement contractor, or pay damages up to the penal sum of the bond. (a) is the payment bond's job, and the two are usually bought together: on private work Civil Code §8608 fixes who may claim on it, and on public work §9550(a) requires one on any contract over $25,000. (b) is the lender's decision, which no surety guarantees. (c) is a separate statutory duty under B&P §7125 and Labor Code §3700.
Civ. Code §8608 / §9550(a)