After entering all the line items with the "Print invoice" button, the invoice will be given a serial number and will be shown in the outgoing invoices. There are strict regulations on the numbering of invoices. CO3 complies with the current invoice numbering regulations. The default number of copies can be modified under the Settings.The requested print direction (to a printer or to a PDF file) can be modified before printing.
After printing, the invoice is finalized and automatically receive an invoice serial number. From this time the invoice cannot be modified, it can only be viewed and copies can be printed out. The invoice cannot be deleted, only an Invalidation invoice can be done.