diff --git a/back/methods/chat/sendCheckingPresence.js b/back/methods/chat/sendCheckingPresence.js
index 7e74a69804..5a4ee2fcf1 100644
--- a/back/methods/chat/sendCheckingPresence.js
+++ b/back/methods/chat/sendCheckingPresence.js
@@ -26,6 +26,10 @@ module.exports = Self => {
     Self.sendCheckingPresence = async(ctx, workerId, message) => {
         const models = Self.app.models;
         const account = await models.Account.findById(workerId);
+        const userId = ctx.req.accessToken.userId;
+
+        if (!account)
+            throw new Error(`Could not send message to worker id ${workerId} from user ${userId}`);
 
         const query = `SELECT worker_isWorking(?) isWorking`;
         const [result] = await Self.rawSql(query, [workerId]);