Most banks support this I thought - just mail a deposit slip and a check (signed, with a "FOR DEPOSIT ONLY" endorsement) to the right address. I've done it befo

Most banks support this I thought - just mail a deposit slip and a check (signed, with a "FOR DEPOSIT ONLY" endorsement) to the right address. I've done it before with ETrade Bank and ING Direct at least, and I imagine brick-and-mortar banks would do this processing if you mailed the check to a nearby branch.