diff --git a/pillarbox-analytics/src/androidTest/java/ch/srgssr/pillarbox/analytics/TestCommandersAct.kt b/pillarbox-analytics/src/androidTest/java/ch/srgssr/pillarbox/analytics/TestCommandersAct.kt
index 2bbcbf884..dfd835d2f 100644
--- a/pillarbox-analytics/src/androidTest/java/ch/srgssr/pillarbox/analytics/TestCommandersAct.kt
+++ b/pillarbox-analytics/src/androidTest/java/ch/srgssr/pillarbox/analytics/TestCommandersAct.kt
@@ -9,6 +9,9 @@ import ch.srgssr.pillarbox.analytics.commandersact.CommandersActEvent
 import ch.srgssr.pillarbox.analytics.commandersact.CommandersActLabels
 import ch.srgssr.pillarbox.analytics.commandersact.CommandersActPageView
 import ch.srgssr.pillarbox.analytics.commandersact.CommandersActSrg
+import com.tagcommander.lib.core.TCUser
+import com.tagcommander.lib.serverside.TCPredefinedVariables
+import com.tagcommander.lib.serverside.schemas.TCDevice
 import org.junit.Assert
 import org.junit.Before
 import org.junit.Test
@@ -48,4 +51,11 @@ class TestCommandersAct {
         commandersAct.setConsentServices(services)
         Assert.assertEquals(expected, commandersAct.getPermanentDataLabel(CommandersActLabels.CONSENT_SERVICES.label))
     }
+
+    @Test
+    fun testLegacyUniqueId() {
+        val legacyUniqueId: String = TCPredefinedVariables.getInstance().uniqueIdentifier
+        Assert.assertEquals(legacyUniqueId, TCDevice.getInstance().sdkID)
+        Assert.assertEquals(legacyUniqueId, TCUser.getInstance().anonymous_id)
+    }
 }
diff --git a/pillarbox-analytics/src/main/java/ch/srgssr/pillarbox/analytics/commandersact/CommandersActSrg.kt b/pillarbox-analytics/src/main/java/ch/srgssr/pillarbox/analytics/commandersact/CommandersActSrg.kt
index aca573720..04dcba52a 100644
--- a/pillarbox-analytics/src/main/java/ch/srgssr/pillarbox/analytics/commandersact/CommandersActSrg.kt
+++ b/pillarbox-analytics/src/main/java/ch/srgssr/pillarbox/analytics/commandersact/CommandersActSrg.kt
@@ -14,6 +14,7 @@ import com.tagcommander.lib.serverside.TCPredefinedVariables
 import com.tagcommander.lib.serverside.TCServerSide
 import com.tagcommander.lib.serverside.TCServerSideConstants
 import com.tagcommander.lib.serverside.events.base.TCEvent
+import com.tagcommander.lib.serverside.schemas.TCDevice
 
 /**
  * CommandersAct for SRG SSR
@@ -44,7 +45,9 @@ internal class CommandersActSrg(
     private val tcServerSide: TCServerSide
 
     init {
-        tcServerSide = TCServerSide(SITE_SRG, config.sourceKey, appContext)
+        tcServerSide = TCServerSide(SITE_SRG, config.sourceKey, appContext).also {
+            workaroundUniqueIdV4Tov5()
+        }
         TCDebug.setDebugLevel(if (BuildConfig.DEBUG) Log.DEBUG else Log.INFO)
 
         config.commandersActPersistentLabels?.let {
@@ -117,6 +120,24 @@ internal class CommandersActSrg(
         }
     }
 
+    /*
+     * From issue :
+     *  - https://github.com/SRGSSR/srgletterbox-android/issues/522
+     *  - https://github.com/CommandersAct/iOSV5/issues/13
+     *
+     * And after discussion with CommandersAct teams and SRG ADI team.
+     */
+    private fun workaroundUniqueIdV4Tov5() {
+        // 1. Use the TC unique id value for new `device.sdk_id` property.
+        useLegacyUniqueIDForSdkID()
+        // 2. Use the TC unique id value for the new `user.consistent_anonymous_id` property.
+        TCPredefinedVariables.getInstance().useLegacyUniqueIDForAnonymousID()
+    }
+
+    private fun useLegacyUniqueIDForSdkID() {
+        TCDevice.getInstance().sdkID = TCPredefinedVariables.getInstance().uniqueIdentifier
+    }
+
     companion object {
         private const val SITE_SRG = 3666