A customized invoice is a type of invoice. Just like a receipt you bought, it is bound into a book. This kind of invoice is almost the same as a receipt. It is written by hand, and then it is applied to tear down the invoice, and the stub is kept for filing. Only when the customized invoice is made, there is a rule that it is not allowed to be opened.

Machine-printed invoices are not customized invoices, but non-customized invoices. There is no saying that they are used in disassembly. Anyway, they are all torn apart and printed for use.