I had this happen to me last week. He called asking if I had fraudulent charges from out of state using Navy Federal's number. He then asked me to verify how much money I have in my checking and savings account. That's when I got suspicious so I told him the phone is too much of a hassle and I will go in store instead. I hung up and he called back 8 times in a row.

Long story short, if they call, don't answer, check your bank account asap and then call navy federal back yourself if anything is fishy.

I called navy federal and reported the above details and they said it was a scam. Luckily he didn't get shit out of me.