First, as long as each party proves the blood relationship between the parties and their parents, it can prove the brother-sister relationship between the two parties. It can be proved circuitously. This has nothing to do with whether the client's account is in the account book.

Second, the general format of proof of kinship:

Proof of kinship

XXXXX police station:

This is to certify that XXX's sex: (male/female) was born on X, X, X, and his address (the address in the household registration book).

ID number: (XXXXXXXXX), family relationship is as follows (lineal blood relatives should be written):

Name, gender, date of birth, address and their relationship (father and son/mother and daughter/mother and son/father and son/brother and sister, etc.). ) (Title) Remarks of work unit:

The above certificate is accurate. If it is untrue, it is willing to bear its legal responsibility and the economic losses caused by it.

Handler (signature): (Village Committee) Seal:

Company telephone number: year, month and day.

Note: 1. This certificate must be filled in with pen or signature pen.

2. This certificate must be issued and sealed by the personnel (organization, labor) department of the unit where the file is located or the place where the file is stored; If there is no unit, it shall be issued and sealed by the sub-district office.

3. According to the laws and customs of China, the appellations should be unified.