Lending and credit decisioning testing

What lending and credit decisioning testing covers

A rule defect in a credit or servicing system repeats on every application or loan that takes the same path, as a lost loan, a fee refund, or a notice defect that an examiner or partner bank can cite. Clause references below were checked against the eCFR (current to 2026-09-14) on 2026-09-16.

Credit decisioning rules and adverse action reasons

Each cut-off in the credit policy is tested below, at, and above its value: score, debt-to-income ratio, verified income, loan amount, and state eligibility. Tests also cover rule precedence, where a knockout rule stops the application before scoring, and the rule version applied to applications submitted before a policy change. Under 12 CFR 1002.6(b)(2)(ii), a scoring system may use age only if an applicant aged 62 or older is not assigned a negative factor or value, so synthetic applicants on both sides of that age run through every scorecard.

A new rule that ships without a reason code makes the notice fall back to a generic reason. Regulation B requires specific principal reasons (1002.9(b)(2)), comment 9(b)(2)-7 takes them from the component of a combined system that the applicant failed, and comment 9(b)(2)-9 states that credit score key factors do not satisfy the requirement. The Regulation B page lists the full requirement table.

Credit bureau data parsing

Bureau response tests cover no-hit, frozen, thin, and multiple returned files, and missing or zero balances. A parser that drops the fraud alert indicator lets the engine approve without an identity step: a user of a report with an initial fraud alert or active duty alert may not establish a new credit plan or extension of credit, other than under an open-end credit plan, unless the user uses reasonable policies and procedures to form a reasonable belief that it knows the requester's identity (15 U.S.C. 1681c-1(h)(1)(B)(i)). A parser that discards tradelines on accounts shared with a spouse loses history that 1002.6(b)(6)(i) requires a creditor who considers credit history to consider.

Repayment schedules and early repayment

Scenarios move loans through scheduled, partial, missed, returned, and early payments, and regenerate the schedule under the contract's rule: shorter term or lower payment. Payoff quotes are tested for the good-through date and for a payment that posts after the quote. For consumer lending, payoff behaviour has to match the 1026.18(k) prepayment disclosure. For precomputed loans, 15 U.S.C. 1615 requires a prompt refund of unearned interest on prepayment in full, with no refund required below $1 (1615(a)), and a payoff statement before the end of the 5-day period that begins when the creditor receives the consumer's request (1615(c)(1)). The arithmetic behind each schedule is recalculated by financial calculation testing.

Late fee and hardship rules

Late fee tests cover grace periods, weekend due dates, payments returned after a fee, and fee caps per state or plan; BNPL plans add a check of the fee count per missed instalment. In collecting consumer credit debt, the FTC Credit Practices Rule makes it an unfair practice for a creditor to levy or collect a delinquency charge on a full payment made on its due date or within the grace period when the only delinquency comes from late fees on earlier instalments (16 CFR 444.4(a)). A payment waterfall that pays the old late fee first breaks that rule on every following cycle.

Hardship tests cover entry, exit, missed plan payments, fee suppression, and accrual during deferral. Under 12 CFR 1026.20(a)(4), a payment schedule change made because of default or delinquency is not a refinancing unless the rate is increased or the new amount financed exceeds the unpaid balance plus earned finance charge and premiums for insurance of the types in 1026.4(d). A refinancing requires new disclosures (1026.20(a)), so tests flag each hardship plan that meets either condition. Payment plans in collections run through the same checks.

Lead routing and partner handoff

Routing tests cover eligibility filters by state and credit tier, bid order, partner timeouts, duplicate leads, and funded-loan postbacks matched to the lead that earns the fee. When an application goes to more than one creditor and no credit is offered, or the applicant does not expressly accept or use the credit offered, each creditor taking adverse action must give notice directly or through a third party, and a third-party notice discloses each creditor's identity (1002.9(g)). A marketplace that regularly refers applicants to creditors is a creditor for 1002.4(a) and (b) (1002.2(l)), so routing filters are tested for prohibited-basis inputs. Partner payloads are tested for encryption in transit over external networks under the GLBA Safeguards Rule, 16 CFR 314.4(c)(3).