Last reviewed: 16 September 2026

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Deceptive mortgage advertising and Regulation N

"As low as" rate ads, teaser terms that quietly assume a borrower profile almost nobody actually has, and a bait-and-switch between the advertised rate and what you're actually offered — the federal rule governing this is Regulation N, the Mortgage Acts and Practices–Advertising Rule (the MAP Rule), adopted in the wake of the 2008 financial crisis.

What Regulation N actually prohibits

Regulation N prohibits any material misrepresentation, in any commercial communication, regarding any term of any mortgage credit product — covering interest rates, fees, the existence or amount of specific charges, and the overall terms being offered. It also imposes recordkeeping requirements on covered advertisers. The rule mirrors the general deceptive-practices standard in Section 5 of the FTC Act, but applies it specifically to mortgage advertising, across lenders, brokers, and other parties who advertise mortgage credit products.

Who enforces it

The Federal Trade Commission and the Consumer Financial Protection Bureau share enforcement authority over Regulation N, and state law enforcement authorities can also bring their own actions for violations. This dual/multi-agency structure means a deceptive mortgage ad can draw scrutiny from more than one direction, not just a single regulator.

The kinds of claims this actually catches

Common examples of the conduct Regulation N is built to catch include advertising a rate that's only available to a narrow group of borrowers without disclosing that clearly, misrepresenting the actual amount or existence of a fee, and other misleading claims about a product's real terms. The rule doesn't ban advertising competitive rates or terms — it bans advertising terms that aren't actually, honestly available to the audience the ad is targeting.

What to actually check

If a rate or term you were shown in an ad, a script, or a rate sheet doesn't match what you're actually offered once you apply, save the original advertisement (a screenshot, a printed flyer, a recorded call script if one exists) — a direct, quotable claim is what a real finding against an originator has to be checked against, not a vague memory of what was implied. Our own standard treats this as its own checkable point (see our standard, point 6), checked specifically against saved, quotable advertising material rather than a paraphrase or a general impression.