diff --git a/PayfritBeacon/Services/APIClient.swift b/PayfritBeacon/Services/APIClient.swift
index 4a74986..730f5c9 100644
--- a/PayfritBeacon/Services/APIClient.swift
+++ b/PayfritBeacon/Services/APIClient.swift
@@ -220,7 +220,7 @@ actor APIClient {
         uuid: String,
         major: Int,
         minor: Int,
-        macAddress: String?,
+        hardwareId: String,
         beaconType: String,
         token: String
     ) async throws {
@@ -230,9 +230,9 @@ actor APIClient {
             "UUID": uuid,
             "Major": major,
             "Minor": minor,
+            "HardwareId": hardwareId,
             "BeaconType": beaconType
         ]
-        if let mac = macAddress { body["MacAddress"] = mac }
         let data = try await post(path: "/beacon-sharding/register_beacon_hardware.php", body: body, token: token, businessId: businessId)
         let resp = try JSONDecoder().decode(OKResponse.self, from: data)
         guard resp.OK else {
@@ -241,12 +241,13 @@ actor APIClient {
     }
 
     func verifyBeaconBroadcast(
+        hardwareId: String,
         uuid: String,
         major: Int,
         minor: Int,
         token: String
     ) async throws {
-        let body: [String: Any] = ["UUID": uuid, "Major": major, "Minor": minor]
+        let body: [String: Any] = ["HardwareId": hardwareId, "UUID": uuid, "Major": major, "Minor": minor]
         let data = try await post(path: "/beacon-sharding/verify_beacon_broadcast.php", body: body, token: token)
         let resp = try JSONDecoder().decode(OKResponse.self, from: data)
         guard resp.OK else {
diff --git a/PayfritBeacon/Views/ScanView.swift b/PayfritBeacon/Views/ScanView.swift
index 64d4586..33601b2 100644
--- a/PayfritBeacon/Views/ScanView.swift
+++ b/PayfritBeacon/Views/ScanView.swift
@@ -706,7 +706,7 @@ struct ScanView: View {
                 uuid: ns.uuid,
                 major: ns.major,
                 minor: Int(config.minor),
-                macAddress: nil,
+                hardwareId: selectedBeacon?.id.uuidString ?? "unknown-ios",
                 beaconType: BeaconType.dxsmart.rawValue,
                 token: token
             )
@@ -739,7 +739,7 @@ struct ScanView: View {
                 uuid: ns.uuid,
                 major: ns.major,
                 minor: Int(config.minor),
-                macAddress: nil,
+                hardwareId: selectedBeacon?.id.uuidString ?? "unknown-ios",
                 beaconType: selectedBeacon?.type.rawValue ?? "Unknown",
                 token: token
             )