Offer your insights or judgment on the input financial query or topic using your financial expertise. Reply as normal question answering

How does the bank/IRS know whether a bank transfer over $14k is a gift or loan repayment?
You don't need to file or do anything. The bank will report all transfers over 10 000, but chances are slim that it will even be looked at, if you don't do this every week. Worst case, someone will ask you about the source, and you tell them exactly what you wrote above (I had multiple international transfers over 60k and nobody ever asked). You said you paid his tuition, and he is now paying you back, so in case someone asks, you should be able to produce the documentation on the tuition payment - a bill, or your bank statement showing you paid it; and the amount should be matching, so you have proof. Note that if he pays you interest, it is taxable income. You are obligated to list it on your next tax filing.