collecting rent in person at a bank

[Lynnette E.]

For the first time I have a person who wants to deposit the rent directly into a bank account.  He has no bank account and goes directly now to pay all bills in person/cash.  Its an inherited tenant for a storage building that is just transiting to me collecting the rent.  Everyone has the same rent for the units.  I am now anticipating many more will want this option.  Mainly as they likely do not have cards or  accounts to use for on-line payments.

Problem I see is that if I give them the account number, how would I know WHO paid?  My banks statements just show deposit and amount.

How do you guys do it?