Once a mistaken transaction showed up and disappeared a few hours later, with no trace left behind at all. I just assumed it was a mistake and didn't bother getting angry.
I had an unexpected deposit show up in my bank account last year and then disappear a day later. The bank sent me a letter in the mail explaining what happened.
years ago, when Wells Fargo first introduced the ability to deposit a check via their mobile app, there was apparently a bug that caused it to sometimes deposit the same check twice.
so, i deposited a $1000 paycheck (was working for a local guy, fixing computers) once and did NOT notice that i actually ended up with $2000 in my account. This went on for at least three months, when all of a sudden I lose $1000 from my account. Apparently Wells Fargo had figured out about the bug and found all the accounts that had gotten double deposits and 'fixed it'.
I had an unexpected deposit show up in my bank account last year and then disappear a day later. The bank sent me a letter in the mail explaining what happened.
Maybe you need a better bank.