If the creditor's right is due and the borrower does not repay the debt, he shall bring a lawsuit to the people's court.
 The prosecution process is mainly to prepare litigation materials. When prosecuting, you can write a statement of complaint, take your ID card and relevant evidence, go to the court filing court to file a lawsuit, and wait for the court to arrange a hearing and make a judgment. The key point of litigation is that the facts are clear and the evidence is sufficient, and the parties need to provide evidence to prove their claims, otherwise they will bear adverse consequences. To prove that others lend you money, only such evidences as IOUs, receipts and IOUs are not enough. The existence of IOUs and receipts only proves that the borrowing relationship is established, but cannot prove whether it is fulfilled. So the evidence you need to provide includes:
 ① Debit receipt, receipt, IOU ② payment voucher, namely, payment transfer certificate. Only when you can provide evidence to prove the fact of borrowing and the fact of money transfer can the court judge determine that the borrowing has indeed been paid, and your claim can be supported. If you decide to sue, you should consult a lawyer first. If the amount is large or you are completely ignorant of the proceedings, you should entrust a lawyer to act as a professional litigant to protect your creditor's rights to the maximum extent.