Home DNA testing and matching websites have implications for donor-conceived people. Using one of the home DNA tests these sites offer plus opting in (or not ‘opting out’) of their ‘matching services’, could mean that your donor, or donor-conceived genetic siblings become identifiable to you and vice versa. It’s also possible that a donor-conceived person might be identified by inference, if they have a close genetic relative using home DNA testing and matching services. Even if the donor-conceived person has not used such a service themselves, the information from the matching service may be able to be combined with other publicly available information about the relevant person, and their donor conceived status and/or their identity could be possible to infer.