If you can’t visit an ATM or a branch—and you don’t want to deposit your checks online or using your smartphone—you can deposit checks (but not cash) by mail. You’ll need to get your bank’s mailing address for deposits, endorse your check, and write “for deposit only” on the back to make it more difficult for someone to cash your check if they steal it from the mail. Enclose a completed deposit slip in your envelope.
Mailing deposits is the slowest way to gain access to your deposits since your check has to go through the mail before it can be processed by your bank and clear. There’s a reason they call it “snail mail.”