Site: SunTrust (Now Truist)Will not let me do a mobile deposit. Get unknown error. Add new comment Comments Yeah I got the same issue updated the app and tried my mobile deposit and didn't get any confirmation. Called truist they said try it again. 'Check has already been deposited' call back it still doesn't show you deposited a check i live 2 hours away from the nearest branch wtf do I do??? reply Add new comment Your name * E-mail * The content of this field is kept private and will not be shown publicly. Comment * Notify me when new comments are posted 57C7M8 Enter the code above * Enter the code without spaces.