I received a card from Royal Mail, telling me that I needed to pay £11 for customs duty for a package. The only clue to the origin of this package was that the reference number ended in '..US'. As to the identity of the Sender, there is no clue. However, I have recently ordered something from the US, so I think I know what this is. If it had been a gift from somebody, I would have had no clue. I went online, as suggested, to pay the fee. There was no option to make a one-off payment, as it usual with businesses, the only way to pay online was to Register for a new Account, with an e-mail address and a Password. Once I was through all that, and had got through the procedures for identifying my address, I was then asked to confirm that I agreed to to the Terms and Conditions. Yikes! Pages and pages of them, most of which did not apply to the business at hand. The first document I opened had 26 pages. All to pay an £11 bill for customs, on a package which has not been identified to me.
When I sent a message to complain, I quoted the Ref. Number of the advice card, ending in "..US", and it was refused, as: "All Royal Mail Reference Numbers end in GB". So I added that to my complaint.
How to run a business.