diff --git a/loopback/locale/en.json b/loopback/locale/en.json
index fdd39325b..b1cfd737f 100644
--- a/loopback/locale/en.json
+++ b/loopback/locale/en.json
@@ -245,6 +245,6 @@
 	"Invalid or expired verification code": "Invalid or expired verification code",
 	"Payment method is required": "Payment method is required",
     "The raid information is not correct": "The raid information is not correct",
-    "Sales already moved": "Sales already moved"
-
+    "Sales already moved": "Sales already moved",
+    "There are tickets to be invoiced": "There are tickets to be invoiced for this zone, please delete them first"
 }
diff --git a/loopback/locale/es.json b/loopback/locale/es.json
index 4e691f375..6cd158eed 100644
--- a/loopback/locale/es.json
+++ b/loopback/locale/es.json
@@ -388,5 +388,6 @@
 	"ticketLostExpedition": "El ticket [{{ticketId}}]({{{ticketUrl}}}) tiene la siguiente expedición perdida:{{ expeditionId }}",
 	"The web user's email already exists": "El correo del usuario web ya existe",
     "Sales already moved": "Ya han sido transferidas",
-    "The raid information is not correct": "La información de la redada no es correcta"
+    "The raid information is not correct": "La información de la redada no es correcta",
+    "There are tickets to be invoiced": "Hay tickets para esta zona, borralos primero"
 }
diff --git a/modules/zone/back/methods/zone/deleteZone.js b/modules/zone/back/methods/zone/deleteZone.js
index 7432475b3..e2e01a949 100644
--- a/modules/zone/back/methods/zone/deleteZone.js
+++ b/modules/zone/back/methods/zone/deleteZone.js
@@ -51,9 +51,9 @@ module.exports = Self => {
             };
 
             const ticketList = await models.Ticket.find(filter, myOptions);
-
-            if (ticketList.length > 0)
-                throw new UserError('There are tickets for this area, delete them first');
+            const hasRefFk = ticketList.some(ticket => ticket.refFk);
+            if (hasRefFk)
+                throw new UserError('There are tickets to be invoiced');
 
             await models.Zone.destroyById(id, myOptions);
 
diff --git a/modules/zone/back/methods/zone/specs/deleteZone.spec.js b/modules/zone/back/methods/zone/specs/deleteZone.spec.js
index aef7fd290..510713f9e 100644
--- a/modules/zone/back/methods/zone/specs/deleteZone.spec.js
+++ b/modules/zone/back/methods/zone/specs/deleteZone.spec.js
@@ -8,14 +8,14 @@ describe('zone deletezone()', () => {
         __: value => value
     };
     const ctx = {req: activeCtx};
-    const zoneId = 4;
-    const zoneId2 = 3;
     let ticketIDs;
 
     beforeAll(async() => {
         spyOn(LoopBackContext, 'getCurrentContext').and.returnValue({
             active: activeCtx
         });
+
+        const zoneId = 4;
         const originalTickets = await models.Ticket.find({
             where: {
                 zoneFk: zoneId
@@ -29,7 +29,7 @@ describe('zone deletezone()', () => {
 
     it('should delete a zone and update their tickets', async() => {
         const tx = await models.Zone.beginTransaction({});
-
+        const zoneId = 4;
         try {
             const options = {transaction: tx};
             await models.Zone.deleteZone(ctx, zoneId, options);
@@ -47,17 +47,18 @@ describe('zone deletezone()', () => {
 
     it('should not delete the zone if it has tickets', async() => {
         const tx = await models.Zone.beginTransaction({});
+        const zoneId = 1;
 
         let error;
         try {
             const options = {transaction: tx};
-            await models.Zone.deleteZone(ctx, zoneId2, options);
+            await models.Zone.deleteZone(ctx, zoneId, options);
             await tx.rollback();
         } catch (e) {
             error = e.message;
             await tx.rollback();
         }
 
-        expect(error).toEqual('There are tickets for this area, delete them first');
+        expect(error).toEqual('There are tickets to be invoiced');
     });
 });