1. When I issue a receipt (debit note) or related documents, I will try my best to write all the contents myself. I can't save trouble for others to write the contents of the document. Sign it yourself. Otherwise, the contents of documents written by others are easy to be altered or changed, and it is difficult to conduct judicial expertise in case of disputes.

2. When you need to write a receipt (debit note), the amount must be in both uppercase and lowercase, because the lowercase amount is easy to be tampered with, for example, it is not difficult to change "1" to "4" and "3" to "5".

3. When writing receipts (IOUs), the distance between words and lines should not be too large, and the edge of the paper should not be too large; Prevent others from using their own signatures to forge other documents.

4. Pay attention to the loan to avoid the other party's objection to the nature of the money received.

5. When issuing the above documents or receiving (owing/borrowing), if a case is involved, try to use my pen and provide evidence (witness).

6. When someone gives you a receipt (debit note), not only should the other party sign and seal it, but also the other party should press the handprint, so as to avoid others changing their handwriting and writing habits afterwards and bringing unnecessary trouble to future identification.

7. At ordinary times, we should pay attention to the collection and preservation of the other party's signature documents, which can provide verification for future disputes.