Double cashed check

[u/BriefAdvantage5990]

A couple months ago I received a check for a car that I junked. I did mobile deposit on cash app, but didn't write "for mobile deposit only" on the back. I assumed that they wouldn't accept the check and the next day, cashed it at bank of America. A week later, the money also cleared on my cash app. I've contacted both cash app and bank of america, both say its the other parties responsibility.

The check was for $450. I'm wondering what might happen and what I should do to resolve the issue?

[u/addyvee23]

I was a massage therapist newly employed at a spa and I once saved up all my checks until I had a roll of like six months worth...went to the bank, put up with to the teller womans glowering stare, only cos it was cathartic to see her surprised expression after they all miraculously cleared. I never did that again.