You can't just have him sign it? I've never had a problem depositing a joint check into a joint account as long as it had both signatures, I have never had a case where both signers had to be physically present. If he signed the check and you deposited the check at an ATM, would they have to check the video tape to make sure you were both in the car?
They might take extra precautions if you want to cash it, but I expect that if you just want to deposit it, they want to see both signatures but they don't need to see both people physically present.
