I tried to register a .dk domain with register.com now they sent me an email and told me i have to send a fax with my id and credit card information to an fax number im sure the hell not gonna do that. Has anybody ever had to do anything like that?

Email from Register.com

In order to protect Register.com and our valued customers, we require the
following information from the billing contact associated with the above
domain(s).

· A photocopy of a government-issued photo ID.
· A signed statement giving Register.com authorization to maintain the charges
associated with the domain name(s)
· Valid Billing Contact Information, including:
Name as it appears on Card
Billing Address for Card (Street Number)
City
State/Province
Country
Postal Code

Probably because of the .dk domain.
They were afraid they were going to be dk'ed :D

They Charged my credit card and now they are threating me they are gonna delete my domain if i dont send them the things i mentioned above. This is unbelievable.

File a chargeback and let it go man. Get a .com