Originally Posted by bluewatersail
I want to know if a company in Germany really exists before I give them my credit card info, so they gave me their Steuernummer and something called a UST ID #. Does this prove anything? Is there anyway I can check it out?
If it's about finding out if the company exists it depends on the jurisdictional form of that company whether you might find it in a local "company register" courts directory, as companys have to be registered.