What counts as adverse action, and what does not. Regulation B's definition at 12 CFR 1002.2(c) covers a refusal to grant credit in substantially the amount or on the terms requested unless you accept or use a counteroffer, a termination or unfavorable change to an account that does not affect all or substantially all of a class of the creditor's accounts, and a refusal to raise your limit when you applied for an increase. It excludes a change you agreed to, any action taken because of inactivity, default or delinquency on that account, a declined transaction at the register (unless it reflects a termination, an unfavorable change or a refused increase), and a refusal because the law prohibits the credit or the creditor does not offer that kind of credit. The statute adds that refusing more credit to a delinquent account, or above an established limit, is not adverse action.
The Fair Credit Reporting Act's definition is wider. Under 15 U.S.C. 1681a(k) adverse action includes the ECOA meaning plus decisions about insurance, employment, certain licenses and benefits, and other consumer-initiated transactions such as a rental application, whenever the decision rests in whole or in part on a consumer report. So a landlord or an insurer can owe you a notice under that Act even though the Equal Credit Opportunity Act is not involved.
Timing. Regulation B requires notice within 30 days after receiving a completed application, within 30 days after taking adverse action on an incomplete application or an existing account, and within 90 days after a counteroffer you do not expressly accept or use. A lender holding an incomplete application may instead send a written notice listing what it still needs and a reasonable deadline (1002.9(c)).
Specific reasons. The statement must "be specific and indicate the principal reason(s)" for the decision, and Regulation B says that statements that the action was based on "internal standards or policies" or that the applicant "failed to achieve a qualifying score on the creditor's credit scoring system are insufficient" (1002.9(b)(2)). A creditor can either put the reasons in the notice or tell you that you may request them within 60 days, in which case it must give them within 30 days of receiving your request, with the name, address and telephone number of the office to ask. The Consumer Financial Protection Bureau issued two circulars on this rule, in 2022 and 2023, one on credit decisions based on complex algorithms and one on the proper use of Regulation B's sample forms; it withdrew both in May 2025, so the regulation's text is the rule to read.
Variations. A creditor that received no more than 150 applications in the preceding calendar year may notify orally (1002.9(d)). Where there are several applicants, notice to one is enough, and it must go to the primary applicant if one is apparent (1002.9(f)). Business credit has its own tiers, set out on the business credit score page. And a creditor that approves you on less favorable terms because of your credit report may owe a different document, the risk-based pricing notice under 15 U.S.C. 1681m(h), rather than an adverse action notice.