I lent my friend 5 thousand, but I didn't write an iou. I didn't reply, but I didn't ask for it either.

You can collect transfer records, chat records, telephone recordings, witness testimony and other relevant evidence materials, and bring a civil lawsuit to the people's court to demand the other party to repay the arrears.

After receiving the prosecution materials, the people's court will decide whether to accept or file a case within seven days. If it is not accepted, a ruling will be made; If you are dissatisfied with the ruling, you can appeal.

After filing the case, the people's court will send a copy of the complaint to the defendant within five days.

The people's court will arrange a hearing. If ordinary procedures are applied, the people's court shall conclude the case within six months from the date of filing the case. If there are special circumstances, it can be extended upon approval and a notice of extension will be issued.

After hearing the case, the people's court will make a judgment according to law and issue a civil judgment; The verdict will state the verdict and the reasons for the verdict.

Legal basis: Civil Procedure Law

Article 119 A prosecution must meet the following conditions:

(1) The plaintiff is a citizen, legal person and other organization that has a direct interest in the case;

(2) Having a clear defendant;

(3) Having specific requests, facts and reasons;

(4) It falls within the scope of civil litigation accepted by the people's court and is under the jurisdiction of the sued people's court.

Article 123 The people's court shall guarantee the right of prosecution enjoyed by the parties according to law. A lawsuit that conforms to Article 119 of this Law must be accepted. Those who meet the conditions for prosecution shall file a case within seven days and notify the parties concerned; If it does not meet the conditions for prosecution, it shall make a ruling within seven days and refuse to accept it; If the plaintiff refuses to accept the ruling, he can appeal.