Why Did My OTP Code Expire?
Learn why one-time codes stop working and how newer requests can invalidate older codes.
Why the code stopped working
OTP codes expire because they are designed to be useful for a short window only. A timeout, a newer code request or completion of the verification can make an older code stop working.
Short validity limits replay
A code that worked forever would behave more like a password. OTP systems intentionally reduce the time in which a captured code can be reused.
A newer request may invalidate the old code
Many senders replace the previous OTP when you request another one. If an older message arrives late, the code inside it may already be useless even though the email itself looks fresh in your inbox.
What to do when a code fails
Confirm you are using the newest message from the correct service. If the code is clearly expired, request one new code and wait for that specific message instead of trying several old values.
The practical takeaway
Expired codes are normal security behavior. Use the newest expected message and avoid creating a pile of competing resends.
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