You sent a proper validation dispute inside the 30-day window — and then one of three failures happened: silence, a reply that proves nothing, or collection that simply continued anyway. Each has a different response, but they share one legal fact in your favor: after a timely written dispute, the collector may not resume collecting the disputed amount until it mails you verification. A collector that skips that step is not winning — it is creating violations you can use. Here is the escalation ladder, in order.
General information, not legal advice. First confirm your dispute really was timely and written — the ladder below depends on it (window rules). If their reply arrived but looks thin, grade it on What counts as debt validation? before climbing.
Short and documentary. State: the date of your original dispute and its mailing receipt; that no verification (or only the enclosed inadequate material) was received; that under §1692g(b) collection of the disputed amount must remain paused until verification is mailed; demand they either mail proper verification or close the account and confirm closure in writing; and note that continued collection will be reported to the CFPB and your state attorney general. Send certified mail; keep everything.
A collector that has not validated may not keep presenting the debt as undisputed. If the account appears on your reports: dispute it with each bureau under the FCRA, identify the listing, and state that the collector failed to verify the debt after a timely dispute. The bureau must investigate (generally 30 days) with the furnisher. Mechanics of medical credit-report disputes live in the credit-report cluster — this page’s letters are your evidence there.
A lawsuit filed while a timely dispute sat unvalidated is powerful defense material. File your Answer on time (summons guide), raise the §1692g violation and the missing verification in your defenses, and attach your dispute correspondence. Judges notice paper trails.
Continued collection after a timely, unvalidated dispute is a textbook FDCPA violation. The statute gives you:
What should I do when a debt collector contacts me? If the contact is about a disputed, unvalidated debt: respond in writing, not by phone. The CFPB’s guidance sequence — know your rights, dispute in writing within the window, keep records — is exactly the ladder on this page when the collector ignores step one.
What can I do if a debt collector contacts me about a debt I already paid or don’t think I owe? The same escalation applies with even stronger facts: your follow-up should attach (this time) the proof of payment or the reason the debt is not yours, and your CFPB complaint should lead with it. Collecting a paid debt after notice is among the clearest violations there is.
What if the debt collector can’t or won’t provide proper validation? Then it cannot lawfully continue collecting the disputed amount after your timely dispute. Your options, in order: written follow-up demanding verification or closure, CFPB and state AG complaints, bureau disputes if the account is reported, and an FDCPA claim through a consumer attorney (consumer-guide summaries of the no-validation scenario list the same four routes).
Can a collector keep collecting if it doesn’t respond to my dispute? No — not if your dispute was written and timely. The law requires the collector to stop collection activities until it provides validation; if it keeps collecting, Nolo’s guidance is the same as this page’s: document it and complain to the CFPB, and talk to a consumer attorney about the violation.
General information, not legal advice. Sources: 15 U.S.C. §1692g(b), §1692k (damages/fees); CFPB Ask CFPB debt-collection guidance; FTC debt collection consumer pages; Nolo, “Debt Validation”; Crediful escalation summary. Reviewed 2026-10-22.