If you are a business (VAT registered or non VAT registered) and ship outside of the EU (import or export), you must register for an Economic Operator Registration and Identification (EORI) code. This code identifies you to Customs as being eligible to ship internationally.Without it, your booking may be turned away by the courier
For UK businesses the format for the EORI code is "GB", followed by your nine digit VAT number, followed by three zeros. If you are non VAT registered, you must still apply for an EORI number. It must be written all in upper case and with no gaps or spaces between the information, eg. GB999999999000. You can find out if you already have a valid EORI number in this format on the European Commission website. You have only one EORI number per legal entity, so every branch of one business will use the same code.