If you are living in germany, https://www.dkms.de/en/become-a-donor https://www.dkms.de/en/become-a-donor has you covered. They'll send you a home kit so you do

If you are living in germany, https://www.dkms.de/en/become-a-donor https://www.dkms.de/en/become-a-donor has you covered. They'll send you a home kit so you don't even need to leave your house to register.