diff --git a/loopback/locale/es.json b/loopback/locale/es.json
index dc662e8d3..cff5f652e 100644
--- a/loopback/locale/es.json
+++ b/loopback/locale/es.json
@@ -102,7 +102,7 @@
 	"Weekday cannot be blank": "El día de la semana no puede quedar en blanco",
 	"You can't delete a confirmed order": "No puedes borrar un pedido confirmado",
 	"Can't create stowaway for this ticket": "No se puede crear un polizon para este ticket",
-	"The socialName has an invalid format": "El nombre fiscal tiene un formato incorrecto",
+	"The social name has an invalid format": "El nombre fiscal tiene un formato incorrecto",
 	"Invalid quantity": "Cantidad invalida",
 	"This postal code is not valid": "This postal code is not valid",
 	"is invalid": "is invalid",
diff --git a/modules/client/back/models/client.js b/modules/client/back/models/client.js
index 7ab8bb477..3dc1e1f8d 100644
--- a/modules/client/back/models/client.js
+++ b/modules/client/back/models/client.js
@@ -55,15 +55,6 @@ module.exports = Self => {
         with: /^[\w|.|-]+@[\w|-]+(\.[\w|-]+)*(,[\w|.|-]+@[\w|-]+(\.[\w|-]+)*)*$/
     });
 
-    Self.validate('businessTypeFk', hasBusinessType, {
-        message: `The type of business must be filled in basic data`
-    });
-
-    function hasBusinessType(err) {
-        if (!this.businessTypeFk)
-            err();
-    }
-
     Self.validatesLengthOf('postcode', {
         allowNull: true,
         allowBlank: true,
@@ -189,6 +180,32 @@ module.exports = Self => {
         return regexp.test(value);
     }
 
+    Self.observe('before save', async ctx => {
+        const changes = ctx.data || ctx.instance;
+        const orgData = ctx.currentInstance;
+
+        const businessTypeFk = changes && changes.businessTypeFk || orgData && orgData.businessTypeFk;
+        const isTaxDataChecked = changes && changes.isTaxDataChecked || orgData && orgData.isTaxDataChecked;
+
+        let invalidBusinessType = false;
+        if (!ctx.isNewInstance) {
+            const isWorker = await Self.app.models.UserAccount.findById(orgData.id);
+            const changedFields = Object.keys(changes);
+            const hasChangedOtherFields = changedFields.some(key => key !== 'businessTypeFk');
+
+            if (!businessTypeFk && !isTaxDataChecked && !isWorker && !hasChangedOtherFields)
+                invalidBusinessType = true;
+        }
+
+        if (ctx.isNewInstance) {
+            if (!businessTypeFk && !isTaxDataChecked)
+                invalidBusinessType = true;
+        }
+
+        if (invalidBusinessType)
+            throw new UserError(`The type of business must be filled in basic data`);
+    });
+
     Self.observe('before save', async function(ctx) {
         const changes = ctx.data || ctx.instance;
         const orgData = ctx.currentInstance;
@@ -206,7 +223,7 @@ module.exports = Self => {
             && orgData.isTaxDataChecked != isTaxDataChecked;
 
         if ((socialNameChanged || dataCheckedChanged) && !isAlpha(socialName))
-            throw new UserError('The socialName has an invalid format');
+            throw new UserError(`The social name has an invalid format`);
 
         if (changes.salesPerson === null) {
             changes.credit = 0;
@@ -374,14 +391,11 @@ module.exports = Self => {
                 throw new UserError(`You don't have enough privileges to set this credit amount`);
         }
 
-        const client = await models.Client.findById(finalState.id, null, ctx.options);
-        if (client.businessTypeFk) {
-            await models.ClientCredit.create({
-                amount: changes.credit,
-                clientFk: finalState.id,
-                workerFk: userId
-            }, ctx.options);
-        }
+        await models.ClientCredit.create({
+            amount: changes.credit,
+            clientFk: finalState.id,
+            workerFk: userId
+        }, ctx.options);
     };
 
     const app = require('vn-loopback/server/server');
diff --git a/modules/supplier/back/models/supplier.js b/modules/supplier/back/models/supplier.js
index 2912a3577..f8b096b30 100644
--- a/modules/supplier/back/models/supplier.js
+++ b/modules/supplier/back/models/supplier.js
@@ -114,6 +114,6 @@ module.exports = Self => {
             && orgData.socialName != socialName;
 
         if ((socialNameChanged) && !isAlpha(socialName))
-            throw new UserError('The socialName has an invalid format');
+            throw new UserError('The social name has an invalid format');
     });
 };