I called the bank up to see if a check had cleared and I checked the balance and the balance is higher than what I should have. I checked the recent activities and last Monday there was a deposit for 100 dollars. I don't remember cashing any checks and I know I did not get any extra money from my job. I only get paid every other Thursday's and they won't just deposit money into the account without a written authorization first. Should I be concerned that there's this extra cash in my account or should I go ahead and spend it.