A method for routeing calls to a single service destination for multi-service users in a telecommunications network, each of said multi-service users having access to a plurality of telephony services including a first telephony service and a second, different, telephony service, said method comprising the steps of: receiving an unanswered call directed to a first telephony party identifier associated with the first telephony service for a user; altering first signalling information for said received unanswered call so as to modify destination information therein, said modified destination information for said call comprising a telephony party identifier associated with said single service destination, wherein the single service destination comprises a voicemail system; and routeing said received unanswered call on the basis of said altered first signalling information, said method being characterised by: adding second signalling information for said received unanswered call so as to add telephony party identifier information therein, said added information for said call comprising a second telephony party identifier, different to said first telephony party identifier, associated with the second telephony service for said user, wherein said added second signalling information is added to a redirection information field in signalling information for said unanswered call such that the voicemail system can be convinced that said unanswered call should be completed to a mailbox service that the voicemail system hosts, whereby to provide call completion to said single service destination for said unanswered call. receiving an unanswered call directed to a first telephony party identifier associated with the first telephony service for a user; altering first signalling information for said received unanswered call so as to modify destination information therein, said modified destination information for said call comprising a telephony party identifier associated with said single service destination, wherein the single service destination comprises a voicemail system; and routeing said received unanswered call on the basis of said altered first signalling information, said method being characterised by: adding second signalling information for said received unanswered call so as to add telephony party identifier information therein, said added information for said call comprising a second telephony party identifier, different to said first telephony party identifier, associated with the second telephony service for said user, wherein said added second signalling information is added to a redirection information field in signalling information for said unanswered call such that the voicemail system can be convinced that said unanswered call should be completed to a mailbox service that the voicemail system hosts, whereby to provide call completion to said single service destination for said unanswered call. adding second signalling information for said received unanswered call so as to add telephony party identifier information therein, said added information for said call comprising a second telephony party identifier, different to said first telephony party identifier, associated with the second telephony service for said user, wherein said added second signalling information is added to a redirection information field in signalling information for said unanswered call such that the voicemail system can be convinced that said unanswered call should be completed to a mailbox service that the voicemail system hosts, whereby to provide call completion to said single service destination for said unanswered call.