If I opened a few payday loans in someone else's name, is the only way to get them out of his name to file a police report?

If you opened several pay day loans in another person's name the best way to clear out the loans is simply to pay them off as soon as possible before something worse happens to you such as a complaint with law enforcement.

The problem in your situation is that once a pay day loan has been opened in some person's name other than your own, the name of the borrower cannot be replaced with another person's name. If you or the person whose name the pay day loans are in file a police report about what happened, I see a negative result for your over what you did.