Over $700 appeared as deposit into my checking account. No idea where it came from. Would you keep it, or call the bank?

I'm Jacob Williams, I joined because the ask community was shut down as of June 30, 2015. If you were previously a member my username on there was informationwizard, maybe you know me from it. I love answering questions and receiving them likewise. It's my sincerest hopes and prayers that this community can with time reach the level of domestication that ask.com accomplished. I'm here to help.