well, my full private address, including name, as well as email and one of the following phone number, fax number, contact form. also you need to be reachable in a „timely manor“ usually 48 hours during workdays.

however i really don’t want to publically display my address and phone number. i’d love to have a fax number that converts to pdf/ email tho. well, and then i’d need to rent an address…