First of all, please ensure that you have the two-character country code at the beginning of the VAT number.  So, if your VAT number was GB1231231231, you would type GB1231231231, not 1231231231.

If you have done this and you still get the invalid VAT number message, please verify your VAT number here: 

If your VAT number is indeed valid, please email and let us know about the issue.

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