How do you put your money order in your mother's checking account?

Money orders are a major source of fraudulent transactions, so you may find that your mother's bank will not allow you to deposit a money order made payable to you into her checking account. You should ask the bank if they will allow it and what requirements they have if they do allow it. They will likely request that both you and your mother be present, sign the check in front of the teller, and provide photo ID.

If the money order is still blank on the front (i.e. no name is written in the "pay to the order of:" line), you can simplify things by making it payable to your mother and allowing her to sign and deposit it.