a) Enterprises with small number of vouchers
You can number your vouchers as a whole from 1 to the last number of the month.
b) Enterprises using different types of vouchers
You can number your vouchers respectively according to different types, for example Receiving 1, Payment 1 and Transfer 1.
c) Enterprises using different types of vouchers and with big amount of cash collection and payment
You can number your vouchers into five types, i.e., Cash receiving 1, Cash payment 1, Bank receiving 1, Bank payment 1, and Transfer 1.
No matter which method you use, vouchers should be numbered in a sequential manner and without duplication.