Lot of places take Amex now. I see most POS taking it. There are some holdouts who only take Visa, Mastercard but pretty much everywhere in my small town take Amex without any comments.
Yes, it is. Usually, a certificate that says, "No record of marriage of this person in this county". Though, there is still a step to apostille and translate it to German for German cities to use it.
- Countries with a link, but are cursive, generally provide the certificate in most cases (this seems to be broken, I see no cursive ones, but the UK is among this group, which one can see when opening the link; but that seems to be the minority).
- All others they seem to suggest need to go through the exemption process.