The following mandatory parts must be included on your invoice:   Invoice date Unique invoice number (number of invoices consecutively and sequentially) VAT & Chamber of Commerce number Name & address of your company Name & address of your customer Een omschrijving, de hoeveelheid en de aard van het product/dienst dat je geleverd hebt A description, the quantity and the nature of the product/service you have supplied
The price excl. VAT and incl. VAT and the VAT amount to be paid. If the reverse charge mechanism applies, you state: “VAT shifted” Payment term / due date (take the term that you have agreed with your customer for this) Debtor number