If there is something wrong with your membership number, you need to write a certificate, which can be written in the following format:

Title: Proof of membership number.

Dear leaders of Communist Youth League organizations,

I am writing this letter to prove that there is something wrong with my league number. I am (your name), (your gender), (your native place), and my ID number is (ID number).

I found that my member number is inconsistent with my joining time. I think this may be caused by mistakes in league organization records or information entry. I deeply feel the importance of this matter to me, so I hope to get your help to solve this problem.

I hereby promise that I will do my best to cooperate with your work to solve this problem as soon as possible. I attach great importance to my league membership, and I hope to solve this problem as soon as possible in order to better serve the organization of the league.

Thank you very much for your patience in reading and look forward to your reply.

I am here to convey

Salute!

(signature)

Date: _ _ _ _ _ _

The above is a basic template of proof materials, which can be modified and supplemented according to the actual situation. Please give this letter to the person in charge of the local Communist Youth League organization so that they can deal with your problem.