diff --git a/core/push/src/main/java/ru/forbion/f7cloud/core/push/F7PushRegistrar.kt b/core/push/src/main/java/ru/forbion/f7cloud/core/push/F7PushRegistrar.kt
index ef97d9e..770cb0a 100644
--- a/core/push/src/main/java/ru/forbion/f7cloud/core/push/F7PushRegistrar.kt
+++ b/core/push/src/main/java/ru/forbion/f7cloud/core/push/F7PushRegistrar.kt
@@ -81,6 +81,28 @@ object F7PushRegistrar {
         return code == 0 || code >= 500 || code == 408 || code == 429
     }
 
+    /**
+     * Снимает устройство с регистрации в f7push (при logout) ДО очистки локальной сессии.
+     * Контракт сервера (f7push v0.2.4, подтверждён integrator-b, mail/110):
+     * `DELETE /ocs/v2.php/apps/f7push/api/v1/devices/{deviceId}`, та же Basic-авторизация +
+     * `OCS-APIRequest`; идемпотентен (200 `success:true` даже если строки нет). Best-effort:
+     * ошибку глотаем (сеть могла отвалиться при выходе), возвращаем HTTP-код или 0.
+     */
+    fun unregisterBlocking(
+        context: Context,
+        session: AuthSession,
+    ): Int {
+        val deviceId = getDeviceId(context)
+        val endpoint = session.serverUrl.trimEnd('/') +
+            "/ocs/v2.php/apps/f7push/api/v1/devices/$deviceId"
+        return try {
+            deleteRequest(endpoint, session)
+        } catch (t: Throwable) {
+            Log.w(TAG, "unregister failed", t)
+            0
+        }
+    }
+
     private fun postJson(endpoint: String, session: AuthSession, json: String): Int {
         val conn = URL(endpoint).openConnection() as HttpURLConnection
         conn.connectTimeout = 15000
@@ -108,6 +130,25 @@ object F7PushRegistrar {
         return code
     }
 
+    private fun deleteRequest(endpoint: String, session: AuthSession): Int {
+        val conn = URL(endpoint).openConnection() as HttpURLConnection
+        conn.connectTimeout = 15000
+        conn.readTimeout = 15000
+        conn.requestMethod = "DELETE"
+        conn.setRequestProperty("Accept", "application/json")
+        conn.setRequestProperty("OCS-APIRequest", "true")
+        val basic = android.util.Base64.encodeToString(
+            "${session.username}:${session.appPassword}".toByteArray(StandardCharsets.UTF_8),
+            android.util.Base64.NO_WRAP
+        )
+        conn.setRequestProperty("Authorization", "Basic $basic")
+
+        val code = conn.responseCode
+        drainQuietly(if (code >= 400) conn.errorStream else conn.inputStream)
+        conn.disconnect()
+        return code
+    }
+
     private fun drainQuietly(stream: InputStream?) {
         if (stream == null) return
         try {