What should I do with my check after I receive confirmation that the image has been received for deposit?

Store checks in a secure place for 30 days after your deposit and then destroy

Once funds have been made available in your account, write "ELECTRONICALLY DEPOSITED on [date]" across the front of the check to avoid the risk of re-depositing. The date should be the month, day, and year you submitted the deposit. Store in a secure place for 30 days after your deposit and then destroy.