You just take it to the bank. One time my friend wrote the amount in the name field and the name in the amount field and they still cashed it. They did contact me about a week later, but by that time I could have just walked away with the cash.
He probably just put it in the ATM, deposited it to his account. Eventually someone will notice, of course... but it will take weeks, longer than it takes for him to cash out his accounts.
If you are depositing into your own account you could even take it to a human teller and likely get it deposited without so much as a raised eyebrow.
Of course, depositing it into your own account creates a "paper trail" that will eventually lead to some law enforcement officer discussing your activities with you at some time in the future.
