Fortunately it's only my address, but "København Ø" fails even on websites in Europe sometimes. The postman understands "Kbenhavn", "K~#benhavn >&" and so on.

Fortunately it's only my address, but "København Ø" fails even on websites in Europe sometimes. The postman understands "Kbenhavn", "K~#benhavn >&" and so on. Very occasionally some address verification thing can't match my address, as one side or the other within their system is corrupting it.