If the law says that providing a fake document to a financial institution is considered fraud / money laundering and can be prosecuted, it makes a lot more sense.
This puts criminals in an untenable position. If they provide fake documents to a bank, they save the police a lot of work. If tere's ever any suspicion of criminal activity in their accounts, nobody has to prove anything beyond the fact that they provided fake documents, which isn't that hard. That's enough to send them to prison. They can always provide real documents of course, but there's a reason they were use fake ones in the first place.
This puts criminals in an untenable position. If they provide fake documents to a bank, they save the police a lot of work. If tere's ever any suspicion of criminal activity in their accounts, nobody has to prove anything beyond the fact that they provided fake documents, which isn't that hard. That's enough to send them to prison. They can always provide real documents of course, but there's a reason they were use fake ones in the first place.