Redemption error messages explained

How validation works

When you enter a code at /redeem, the site calls /api/redemption/validate and returns a message plus an errorCode when invalid.

Common error codes

Code	What it usually means	What to do
CODE_NOT_FOUND	No matching code in our system	Re-check characters (0/O, 1/I); see Where do I find my redemption code?
CODE_ALREADY_USED	Single-use code already redeemed	Open Media Library instead of re-entering the code — already redeemed help
CODE_EXPIRED	Code past its expiry date	Contact /help/contact with purchase proof
VALIDATION_ERROR	Missing code, bad email, or format issue	Enter the full code; use a valid email for guest redeem
PURCHASER_SELF_REDEEM	Distributor inventory code blocked for purchaser	Redeem through the intended reader flow (distribution codes)
SERVER_ERROR	Temporary server issue	Wait and retry; contact support if it persists

Friendly “already yours” states

If you already redeemed successfully, validation may return a green message that the library already has the title — open /library instead of treating it as an error.

Rate limits

Too many validation attempts trigger a short cooldown on the redeem page.