I loaned $15,000 to a family member that is ready to be paid back. How do I receive the money without having to fill out any paperwork? Two separate transactions?

Just as the question says, I loaned $15k to a family member. If I receive the whole $15k, the transaction gets reported to the IRS. Should I just have two separate transactions at least 24 hours apart to avoid having to do any paperwork? Thanks