If you are selling to a business, it is very important to include certain information in the invoices you issue to them. In order to ensure, that your B2B invoices are correct, please do the following checks: 

• Check your customer`s VAT identification number in the VIES system, in order to ensure that your customer is properly VAT registered.
• Make sure to mention your customer`s VAT identification number with the two-letter country prefix on the invoice.
• Make sure that your own VAT identification number is shown on the invoice.