One year ago, we had a bone marrow donor drive at the FMS headquarters in Hamburg. Our colleague Oliver took part and joined the register. He says: "Joining the register is simple: Fill out a form and swab your mouth with a cotton swab. You don't need to do anything else, apart from waiting for the call."
One year later, he received that call from the DKMS (https://www.dkms.de/en) and was informed that he is a match. The next steps were doing some more blood tests and making sure that he was healthy and a viable candidate for donation. Every step was organized very well by the DKMS and all information needed was provided.