Voucher bookkeeping of digital financial platform needs signature. According to the relevant public information, documents or invoices are the original documents to record the economic activities of the unit, and each economic activity accounting should be carefully checked and signed. The main contents of the signature are: 1. Check whether the economic activities of invoices or documents are legal and legitimate. 2. Check whether the use of invoices or vouchers meets the needs. 3. Check whether the agent of the invoice or document has signed it. 4. Check whether the person in charge of the invoice or document has signed it.