The following are Callback Service tags.

TagDescription
[[eventID]]The unique Event ID for the Event the attendee record is associated with. This tag can be used to improve processing performance within the target system and allows for a generic callback URL to be supported for multiple event integrations.
[[bridgeID]]The unique identifier assigned by Cvent Passkey when attendee-specific information is sent from a third party application using the RegLink Open API.
[[extAckNumber]]An attendee-specific identifier assigned by a registration system to the attendee’s registration record. For example, a “Registration ID”.
[[resAckNum]]The reservation acknowledgement (confirmation) number for the housing reservation in Cvent Passkey.
[[masterResAckNum]]The reservation master acknowledgement number applies to room list reservations created in Cvent Passkey. The same number is used for all reservations created within a single room list.
[[hotelConfNumber]]The confirmation number for the reservation in the hotel’s PMS system - only available once reservations begin to transfer to the hotel.
[[resStatus]]The status of the reservation in Cvent Passkey: “0” (New), “1” (Cancelled),“2” (Modified), “3” (Modified and Cancelled,“5” (No Show (NS),“7” (No Show (NS),“8” (Waitlist/Pending)
[[lastName]]The last name of the primary attendee on the reservation or bridge ID, depending upon the type of Callback service. If the Callback service is a Bridge Notify Link or Bridge User Link, then it uses the bridge last name. If the Callback service is an Action Link or User Link, it uses the reservation last name.
[[ResContactPhone]]The phone number of the primary attendee on the reservation or in the bridge depending upon the type of Callback service. If the Callback service is a Bridge Notify Link or Bridge User Link, then it uses the bridge phone number. If the Callback service is an Action Link or User Link, it uses the reservation phone number.
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