diff --git a/client/client/src/address-edit/address-edit.html b/client/client/src/address-edit/address-edit.html
index f703c38030..e846eadfe9 100644
--- a/client/client/src/address-edit/address-edit.html
+++ b/client/client/src/address-edit/address-edit.html
@@ -77,7 +77,7 @@
                             margin-medium-left
                             orange
                             icon="add_circle"
-                            ng-if = "observation.showAddIcon" 
+                            ng-if = "observation.showAddIcon && observationsTypes.model.length > $ctrl.observations.length" 
                             ng-click="$ctrl.addObservation()"
                         ></vn-icon>  
                     </vn-one>
diff --git a/client/client/src/address-edit/address-edit.js b/client/client/src/address-edit/address-edit.js
index 8d7a569948..90009cbe82 100644
--- a/client/client/src/address-edit/address-edit.js
+++ b/client/client/src/address-edit/address-edit.js
@@ -13,7 +13,7 @@ export default class Controller {
             id: parseInt($state.params.addressId)
         };
         this.observations = [];
-        this.observationsDictionary = {};
+        this.observationsOld = {};
         this.observationsRemoved = [];
     }
 
@@ -60,11 +60,16 @@ export default class Controller {
         return this.$http.post(`/client/api/AddressObservations/crudAddressObservations`, objectObservations);
     }
 
+    _observationsEquals(ob1, ob2) {
+        return ob1.observationTypeFk === ob2.observationTypeFk && ob1.description === ob2.description;
+    }
+
     submit() {
         this._unsetDirtyForm();
         let submitWatcher = this.$scope.watcher.dataChanged();
         let submitObservations;
         let repeatedTypes = false;
+        let types = [];
         let observationsObj = {
             delete: this.observationsRemoved,
             create: [],
@@ -73,31 +78,27 @@ export default class Controller {
 
         for (let i = 0; i < this.observations.length; i++) {
             let observation = this.observations[i];
-            // only one observation is allowed for each of its types
-            if (this.observationsDictionary[observation.observationTypeFk] !== undefined && // IF the dictionary contains the type
-                    (
-                    // AND (is a new Observation OR is old but with distinct Id) --> repeated
-                    !observation.id || (observation.id && this.observationsDictionary[observation.observationTypeFk].id !== observation.id)
-                    )
-                ) {
+            let isNewObservation = observation.id === undefined;
+
+            if (types.indexOf(observation.observationTypeFk) !== -1) {
                 repeatedTypes = true;
                 break;
             }
 
-            if (!observation.id && observation.observationTypeFk && observation.description) {
+            types.push(observation.observationTypeFk);
+
+            if (isNewObservation && observation.observationTypeFk && observation.description) {
                 observationsObj.create.push(observation);
-            } else if (observation.id && this.observationsDictionary[observation.observationTypeFk].description !== observation.description) {
+            } else if (!isNewObservation && !this._observationsEquals(this.observationsOld[observation.id], observation)) {
                 observationsObj.update.push(observation);
             }
-
-            this.observationsDictionary[observation.observationTypeFk] = observation;
         }
 
         submitObservations = observationsObj.update.length > 0 || observationsObj.create.length > 0 || observationsObj.delete.length > 0;
 
         if (repeatedTypes) {
             this.vnApp.showMessage(
-                this.$translate.instant('you can not repeat the types of observations')
+                this.$translate.instant('The observation type must be unique')
             );
         } else if (submitWatcher && !submitObservations) {
             this.$scope.watcher.submit().then(() => {
@@ -126,7 +127,7 @@ export default class Controller {
         this.$http.get(`/client/api/AddressObservations?filter=${JSON.stringify(filter)}`).then(res => {
             this.observations = res.data;
             res.data.forEach(item => {
-                this.observationsDictionary[item.observationTypeFk] = Object.assign({}, item);
+                this.observationsOld[item.id] = Object.assign({}, item);
             });
         });
     }
diff --git a/client/client/src/address-edit/locale/es.yml b/client/client/src/address-edit/locale/es.yml
index aad6a3c875..78f2360394 100644
--- a/client/client/src/address-edit/locale/es.yml
+++ b/client/client/src/address-edit/locale/es.yml
@@ -1,2 +1,5 @@
 Enabled: Activo
-Is equalizated: Recargo de equivalencia
\ No newline at end of file
+Is equalizated: Recargo de equivalencia
+Observation type: Tipo de observación
+Description: Descripción
+The observation type must be unique: El tipo de observación ha de ser único
\ No newline at end of file