The right upper corner of your invoice contains important information, to help you identify your invoice. This area includes your customer number, as well as your invoice number beginning with "DRP". Any questions regarding your invoice can be quickly answered by supplying either your customer number or invoice number.
If you receive your invoices via e-mail, you will also find your customer number in the subject line.
You can also find your customer number and invoice number on your credit card statement.
