Why am I getting verification codes I did not request?

Reviewed answer

It may be a sign-in attempt or a mistake; the code alone does not prove a takeover.

Do not share the code or respond to anyone asking for it.
Open the named service directly and review recent sign-ins and recovery information.
If activity is suspicious, change the account password and end unfamiliar sessions. Contact official support if you cannot access the account.

Get help if

A sign-in succeeded without you, recovery details changed, or a caller asks for the code you just received.