diff --git a/NucleicRemote/NucleicRemote/Notifications.swift b/NucleicRemote/NucleicRemote/Notifications.swift
index c12a4b5..c6c3cb6 100644
--- a/NucleicRemote/NucleicRemote/Notifications.swift
+++ b/NucleicRemote/NucleicRemote/Notifications.swift
@@ -20,6 +20,12 @@ final class NotificationRouter: NSObject {
     /// The store notifications act on; set once at app start.
     weak var store: RemoteStore?
 
+    /// The delivered identifier of the remote wake tickle ("A session is waiting for your
+    /// approval"). A remote notification's identifier equals its `apns-collapse-id`, so this must
+    /// match the relay's `APPROVAL_COLLAPSE_ID` (cloud/nucleic-edge/src/apns.ts) for the recall to
+    /// target the right notification.
+    static let approvalTickleIdentifier = "approval-pending"
+
     // Category / action identifiers (also referenced from the notification service side).
     static let approvalCategory = "NUCLEIC_APPROVAL"
     static let approvalActionableCategory = "NUCLEIC_APPROVAL_ACTIONABLE"