What should I do if I didn't request a password reset?

Short Answer: If you didn't request it you can ignore and delete the email; no action will be taken if you do nothing.

Steps

If you receive a password reset email you did not request, do not click the link or button.
No changes are made to your account.
Delete the email or mark it as spam if you suspect it is malicious.
The reset attempt will not affect your account if you do not use the link.
If you are concerned about account security, proactively request a password reset for your account and set a new password that you control.
You regain control by setting a new password.

Multiple unexpected reset emails arrive.
Likely Cause: Someone repeatedly attempted to reset using your email address.
Action: Ignore emails if you don't request them; consider proactively resetting your password for extra safety.

Note: The email includes the line: "If you didn’t sign up for Cointab, you can safely ignore this message — no action will be taken."