In some cases a service is already available via eduGAIN without you knowing it. This is often the case for publisher services that were (in pre-eduGAIN times) often registered with many national federations. Therefore, some services are already published in eduGAIN. If your service already supports SAML login (i.e it uses a SAML Service Provider), it is recommended to first check that the Service Provider (SP) is not yet in eduGAIN. This can be checked by searching for the service’s domain name on the REFEDS MET service, which contains a complete lest of all federated services worldwide. If MET finds an entry for your service and if it lists eduGAIN as one of the federations that includes your service’s metadata, you might not have to register the service again. All that then remains to do is to check if the Identity Providers (IdP) of your target user’s organisation are also in eduGAIN. This can be check with the domain names of these organisations and the eduGAIN isFederated Check. If the majority of organisations of your service’s target group is federated but not in eduGAIN, it still might make sense in the short term to join a local federation .