You can write a nickname for a loan, but it is not recommended to write it like this, which is prone to disputes. If the other party does not recognize the signature, he can apply for handwriting identification to prove that he is himself. Generally speaking, as long as there is a true intention to prove the relationship between the parties, it is also protected by law.

legal ground

Article 470 of the Civil Code of People's Republic of China (PRC)

The contents of a contract shall be agreed upon by the parties, and generally include the following clauses:

(1) The name and domicile of the party concerned;

(2) Subject matter;

(3) quantity;

(4) quality;

(5) Price or remuneration;

(6) Time limit, place and method of performance;

(7) Liability for breach of contract;

(8) Methods for resolving disputes.

The parties may conclude a contract by referring to the model texts of various contracts.

Article 469 of the Civil Code of People's Republic of China (PRC)

The parties may conclude a contract in writing, orally or in other forms.

Written form refers to contracts, letters, telegrams, telexes, faxes and other forms that can tangibly express the contents contained.

A data message that can tangibly express its content through electronic data interchange, e-mail, etc. , and can be retrieved at any time, are considered in writing.