diff --git a/src-db/database/sourcedata/AD_MESSAGE.xml b/src-db/database/sourcedata/AD_MESSAGE.xml
--- a/src-db/database/sourcedata/AD_MESSAGE.xml
+++ b/src-db/database/sourcedata/AD_MESSAGE.xml
@@ -2138,6 +2138,18 @@
 <!--31C36BB5828F4F23A68CBD65631A686F-->  <ISINCLUDEINI18N><![CDATA[N]]></ISINCLUDEINI18N>
 <!--31C36BB5828F4F23A68CBD65631A686F--></AD_MESSAGE>
 
+<!--31C59D44C69E417F8F59C0C0974BEA3D--><AD_MESSAGE>
+<!--31C59D44C69E417F8F59C0C0974BEA3D-->  <AD_MESSAGE_ID><![CDATA[31C59D44C69E417F8F59C0C0974BEA3D]]></AD_MESSAGE_ID>
+<!--31C59D44C69E417F8F59C0C0974BEA3D-->  <AD_CLIENT_ID><![CDATA[0]]></AD_CLIENT_ID>
+<!--31C59D44C69E417F8F59C0C0974BEA3D-->  <AD_ORG_ID><![CDATA[0]]></AD_ORG_ID>
+<!--31C59D44C69E417F8F59C0C0974BEA3D-->  <ISACTIVE><![CDATA[Y]]></ISACTIVE>
+<!--31C59D44C69E417F8F59C0C0974BEA3D-->  <VALUE><![CDATA[OBPOS_GrossDifferenceErrorMsg]]></VALUE>
+<!--31C59D44C69E417F8F59C0C0974BEA3D-->  <MSGTEXT><![CDATA[The sum of the gross of each line does not equal the gross of the order. Click Reload to refresh the page. If the problem persists please contact your System Administrator.]]></MSGTEXT>
+<!--31C59D44C69E417F8F59C0C0974BEA3D-->  <MSGTYPE><![CDATA[I]]></MSGTYPE>
+<!--31C59D44C69E417F8F59C0C0974BEA3D-->  <AD_MODULE_ID><![CDATA[FF808181326CC34901326D53DBCF0018]]></AD_MODULE_ID>
+<!--31C59D44C69E417F8F59C0C0974BEA3D-->  <ISINCLUDEINI18N><![CDATA[N]]></ISINCLUDEINI18N>
+<!--31C59D44C69E417F8F59C0C0974BEA3D--></AD_MESSAGE>
+
 <!--328A03FF723548E98809914F98831E60--><AD_MESSAGE>
 <!--328A03FF723548E98809914F98831E60-->  <AD_MESSAGE_ID><![CDATA[328A03FF723548E98809914F98831E60]]></AD_MESSAGE_ID>
 <!--328A03FF723548E98809914F98831E60-->  <AD_CLIENT_ID><![CDATA[0]]></AD_CLIENT_ID>
@@ -7553,6 +7565,18 @@
 <!--A7CBAF28EE6C42A791DF740B61D77D4C-->  <ISINCLUDEINI18N><![CDATA[N]]></ISINCLUDEINI18N>
 <!--A7CBAF28EE6C42A791DF740B61D77D4C--></AD_MESSAGE>
 
+<!--A8173931FC504CBE935CAB843580E916--><AD_MESSAGE>
+<!--A8173931FC504CBE935CAB843580E916-->  <AD_MESSAGE_ID><![CDATA[A8173931FC504CBE935CAB843580E916]]></AD_MESSAGE_ID>
+<!--A8173931FC504CBE935CAB843580E916-->  <AD_CLIENT_ID><![CDATA[0]]></AD_CLIENT_ID>
+<!--A8173931FC504CBE935CAB843580E916-->  <AD_ORG_ID><![CDATA[0]]></AD_ORG_ID>
+<!--A8173931FC504CBE935CAB843580E916-->  <ISACTIVE><![CDATA[Y]]></ISACTIVE>
+<!--A8173931FC504CBE935CAB843580E916-->  <VALUE><![CDATA[OBPOS_GrossDifferenceErrorTitle]]></VALUE>
+<!--A8173931FC504CBE935CAB843580E916-->  <MSGTEXT><![CDATA[Gross Differences]]></MSGTEXT>
+<!--A8173931FC504CBE935CAB843580E916-->  <MSGTYPE><![CDATA[I]]></MSGTYPE>
+<!--A8173931FC504CBE935CAB843580E916-->  <AD_MODULE_ID><![CDATA[FF808181326CC34901326D53DBCF0018]]></AD_MODULE_ID>
+<!--A8173931FC504CBE935CAB843580E916-->  <ISINCLUDEINI18N><![CDATA[N]]></ISINCLUDEINI18N>
+<!--A8173931FC504CBE935CAB843580E916--></AD_MESSAGE>
+
 <!--A847E3FCBDCD4ED98A1FB6671E5A4420--><AD_MESSAGE>
 <!--A847E3FCBDCD4ED98A1FB6671E5A4420-->  <AD_MESSAGE_ID><![CDATA[A847E3FCBDCD4ED98A1FB6671E5A4420]]></AD_MESSAGE_ID>
 <!--A847E3FCBDCD4ED98A1FB6671E5A4420-->  <AD_CLIENT_ID><![CDATA[0]]></AD_CLIENT_ID>
diff --git a/web/org.openbravo.retail.posterminal/js/pointofsale/view/toolbar-left.js b/web/org.openbravo.retail.posterminal/js/pointofsale/view/toolbar-left.js
--- a/web/org.openbravo.retail.posterminal/js/pointofsale/view/toolbar-left.js
+++ b/web/org.openbravo.retail.posterminal/js/pointofsale/view/toolbar-left.js
@@ -464,6 +464,36 @@
         showMandatoryServices, checkStock;
     if (this.disabled === false) {
       var receipt = me.model.get('order');
+      //verify that the sum of the gross of each line equals the gross
+      var gross = receipt.get('gross');
+      var linesGross = 0,
+          totalDiscount = 0;
+      var base, isFieldUndefined = false;
+      _.each(receipt.get('lines').models, function (line) {
+        linesGross = OB.DEC.add(linesGross, line.get('gross'));
+        base = line.get('price');
+        _.forEach(line.get('promotions') || [], function (discount) {
+          var discountAmt = discount.actualAmt || discount.amt || 0;
+          discount.basePrice = base;
+          discount.unitDiscount = OB.DEC.div(discountAmt, line.get('qtyToApplyDisc') || line.get('qty'));
+          totalDiscount = OB.DEC.add(totalDiscount, discountAmt);
+          base = OB.DEC.sub(base, discount.unitDiscount);
+        }, this);
+      });
+      linesGross = OB.DEC.sub(linesGross, totalDiscount);
+      var grossDifference = OB.DEC.sub(gross, linesGross);
+      if (OB.DEC.abs(grossDifference) > 0.01 && receipt.get('priceIncludesTax')) {
+        OB.error("The sum of the gross of each line does not equal the gross: " + gross + ", difference: " + grossDifference + ", totalDiscounts: " + totalDiscount);
+        OB.UTIL.showConfirmation.display(OB.I18N.getLabel('OBPOS_GrossDifferenceErrorTitle'), OB.I18N.getLabel('OBPOS_GrossDifferenceErrorMsg'), [{
+          label: OB.I18N.getLabel('OBPOS_Reload')
+        }], {
+          onHideFunction: function () {
+            window.location.reload();
+          },
+          autoDismiss: false
+        });
+      }
+
       if (receipt.get('isQuotation') && receipt.get('bp').id === OB.MobileApp.model.get('terminal').businessPartner && !OB.MobileApp.model.get('terminal').quotation_anonymouscustomer) {
         OB.UTIL.showConfirmation.display(OB.I18N.getLabel('OBMOBC_Error'), OB.I18N.getLabel('OBPOS_quotationsOrdersWithAnonimousCust'));
         return;