Decline code 55: Incorrect PIN
By Calum Ewing · Head of FulfillmentReviewed by Jay StevensUpdated 3 min readQuick answer
Decline code 55 — “Incorrect PIN” — comes from the cardholder’s issuing bank: the PIN entered with the transaction did not match the one on file. Under the ISO 8583 standard it’s a hard decline tied to a customer action, so an immediate retry won’t clear it. Stripe normalizes the broader family as an incorrect_number / invalid card error, and Authorize.net returns reason code 37 (card number invalid). Recovering it takes customer action or a card update, not blind re-attempts.
What code 55 means
Don't blind-retry a 55 — the same charge will keep declining until the cardholder re-enters the right PIN, and on a card-not-present recurring charge there is no PIN to fix at all. Recover it with customer outreach or a card update, not back-to-back re-attempts.
Cross-processor equivalents
The same issuer decision surfaces under a different code on every processor. Here is how code 55 maps across the stacks Revatto recovers on.
Why it happens
- The cardholder simply entered the wrong PIN at the terminal or checkout — a typo or a forgotten PIN.
- The PIN on file with the issuer was recently changed and the cardholder used the old one.
- A reissued or replaced card whose new PIN has not propagated, or whose old PIN no longer applies.
- A card-not-present recurring charge attempted against a card record that expects PIN verification it can’t supply — the stored card details no longer match.
- Issuer-side PIN verification failure or a temporary block after repeated incorrect PIN attempts.
How to recover it
- 1Don’t re-run the same charge right away — a 55 won’t clear on a blind retry, and repeated incorrect-PIN attempts can trip an issuer block on the card.
- 2Reach the customer on a channel they actually answer — email and SMS — let them know the payment didn’t go through, and ask them to re-enter the correct PIN or confirm an up-to-date card.
- 3When the card itself is the problem, get a current card on file — an updated number or a freshly added payment method clears the mismatch that drove the PIN failure.
- 4When it persists, a real person — not another automated email — works the card update directly. That AI-plus-human handoff is exactly what Revatto does for you: we recover the payment end to end, and you only pay if it works (20% of the first recovered payment, $0 setup, $0 monthly, cancel anytime).See how Revatto recovers 55declines →
See what Revatto would recover for you
Failed payments recovered automatically — no engineering, no manual chasing. We do the work; you keep the revenue.