diff --git a/modules/client/back/models/client.js b/modules/client/back/models/client.js
index dc60d31117..a73070a61e 100644
--- a/modules/client/back/models/client.js
+++ b/modules/client/back/models/client.js
@@ -198,9 +198,9 @@ module.exports = Self => {
         if (payMethodChanged || ibanChanged || dueDayChanged) {
             const message = `La forma de pago del cliente con id ${instance.id} ha cambiado`;
             const salesPersonFk = instance.salesPersonFk;
-            const salesPerson = await Self.app.models.Worker.findById(salesPersonFk);
 
-            if (salesPerson) {
+            if (salesPersonFk) {
+                const salesPerson = await Self.app.models.Worker.findById(salesPersonFk);
                 await Self.app.models.Message.send(ctx, {
                     recipientFk: salesPerson.userFk,
                     message: message