Rule number 1. Your bank, electric company etc. will never call and ask you for your account number. If they dont know it nobody does!
Rule number 2. Once your account is opened, they will NEVER ask you to verify anything, certainly not your name, social security number and banking information. The most they might ask you to verify every so often, IF, you are signed up for online communication is to verify your email address, and even then, they will make it clear the communication came from them.
Rule number 3. If you are unsure about communication supposedly from a financial institution, ask them to verify that they are who they claim they are. If is not to your satisfaction, hang up on them, you are not obligated to speak to them. If you are unsure, go into a local branch and ask them if there are issues with your account that require them to reach out to you.
Rule number 4. And this really should be rule number 1, if you dont know who is calling, pull a “Tom Mabe” on them.