diff --git a/client/src/main/kotlin/io/flamenet/client/Conversations.kt b/client/src/main/kotlin/io/flamenet/client/Conversations.kt
index ea62792..1b5ee14 100644
--- a/client/src/main/kotlin/io/flamenet/client/Conversations.kt
+++ b/client/src/main/kotlin/io/flamenet/client/Conversations.kt
@@ -532,6 +532,28 @@ class Conversations(
     fun sendPlaintextForGroupInvite(toUserId: Long, text: String): Sent =
         sendPlaintext(toUserId, text)
 
+    /**
+     * Whether an envelope is worth interrupting somebody for.
+     *
+     * 🔴 **Everything this app sends was.** The relay holds ciphertext and
+     * cannot tell a call answer from a birthday message, so it announced every
+     * envelope as "New message" — and call answers, call ends, delivery keys,
+     * key-log gossip, reactions and avatars are all envelopes. One call
+     * produced a burst of banners on the far end for things nobody sent.
+     *
+     * ⚠️ A plain string is a message: text from an older build carries no
+     * envelope at all, and the safe reading of something unrecognised is that a
+     * person meant to say it.
+     */
+    private fun warrantsAlert(body: String): Boolean {
+        if (!body.startsWith("""{"fnc":""")) return true
+        val content = Content.parse(body)
+        // Only the OFFER announces itself. An answer and a hang-up are the far
+        // end's half of a conversation already on screen.
+        content.call?.let { return it.action == Content.CallSignal.OFFER }
+        return content.isRenderable
+    }
+
     private fun sendPlaintext(toUserId: Long, text: String): Sent {
         // 🔴 **The DIRECTORY, not the key route.** `/e2e/keys` pops a one-time
         // prekey per device and is metered per contact pair — calling it on
@@ -696,6 +718,7 @@ class Conversations(
             try {
                 relay.sendEnvelopes(
                     toUserId, outgoing, identity.deviceId,
+                    silent = !warrantsAlert(text),
                     // ⚠️ The key only when there is no capability. Sending both
                     // would let the relay accept on the key when the capability
                     // had been revoked, so it would never learn it was refused
diff --git a/client/src/main/kotlin/io/flamenet/client/RelayClient.kt b/client/src/main/kotlin/io/flamenet/client/RelayClient.kt
index a171457..61e7ca4 100644
--- a/client/src/main/kotlin/io/flamenet/client/RelayClient.kt
+++ b/client/src/main/kotlin/io/flamenet/client/RelayClient.kt
@@ -217,6 +217,19 @@ class RelayClient(
          * revocation is the whole lever §21 adds.
          */
         deliveryToken: String? = null,
+        /**
+         * Deliver without announcing: protocol traffic, not a message.
+         *
+         * 🔴 **The relay announced everything, because it cannot tell.** It
+         * holds ciphertext, so a call answer, a delivery key and a birthday
+         * message are the same bytes to it — and every one of them raised
+         * "New message" on the far end. One call produced a burst of banners
+         * for things nobody sent. The sender is the only party that knows.
+         *
+         * ⚠️ Advisory and unauthenticated. A sender that lies suppresses its
+         * own notifications and nobody else's.
+         */
+        silent: Boolean = false,
     ): JSONObject =
         postJson("/e2e/messages", JSONObject()
             .put("to", toUser)
@@ -224,6 +237,7 @@ class RelayClient(
                 if (deliveryToken != null) body.put("delivery_token", deliveryToken)
                 else if (deliveryKey != null) body.put("delivery_key", deliveryKey)
                 else body.put("from_device", fromDevice)
+                if (silent) body.put("silent", true)
             }
             .put("messages", JSONArray().also { array ->
                 envelopes.forEach {