The present disclosure involves systems, software, and computer implemented methods for using multiple synonymous identifiers in data privacy integration protocols. One example method includes identifying a request to initiate a protocol in a multiple-application landscape for an object with an identifier. A determination is made that at least one context-using application participant of the protocol relies on a context-providing application participant of the protocol for resolving the identifier to a local identifier local to a context of the context-providing application participant. A resolution request is sent to context-providing application participants that can provide resolution for an identifier for at least one context-using application. A local identifier corresponding to the identifier that is local to the context of the context-providing application participant is received from each context-providing application participant. A protocol work package that includes a resolved local identifier to is sent to each context-using application participant.