Federated Identifier
From MgmtWiki
Fill Title or Meme
The Federated Identifier is one assigned by an Identifier or Attribute Provider like hotmail or gmail as well as organizations like work and school accounts.
Also known as use of a Federated Identifier.
Context
While it is common to see an email address used as a Federated Identifier, is is unceasingly common to see a mobile phone number used instead. The interesting thing about both of these Identifiers is that they also serve as Notice Identifiers.