diff --git a/apier/v1/resourcesv1_it_test.go b/apier/v1/resourcesv1_it_test.go
index 92cd9d692..84f8e9688 100644
--- a/apier/v1/resourcesv1_it_test.go
+++ b/apier/v1/resourcesv1_it_test.go
@@ -221,7 +221,7 @@ func testV1RsTTL0(t *testing.T) {
 		Units:   2,
 	}
 	if err := rlsV1Rpc.Call(utils.ResourceSv1AllocateResource, argsRU, &reply); err == nil ||
-		err.Error() != utils.ErrResourceUnavailable.Error() {
+		err.Error() != utils.ErrResourceUnalocated.Error() {
 		t.Error(err)
 	}
 	// make sure no usage was recorded
@@ -330,7 +330,8 @@ func testV1RsAllocateResource(t *testing.T) {
 				"Destination": "1002"},
 		}, Units: 1,
 	}
-	if err := rlsV1Rpc.Call(utils.ResourceSv1AllocateResource, argsRU, &reply); err == nil || err.Error() != utils.ErrResourceUnavailable.Error() {
+	if err := rlsV1Rpc.Call(utils.ResourceSv1AllocateResource,
+		argsRU, &reply); err == nil || err.Error() != utils.ErrResourceUnalocated.Error() {
 		t.Error(err)
 	}
 	eAllocationMsg = "ResGroup1"
@@ -386,7 +387,7 @@ func testV1RsAuthorizeResources(t *testing.T) {
 		Units: 7,
 	}
 	if err := rlsV1Rpc.Call(utils.ResourceSv1AuthorizeResources,
-		argsRU, &reply); err.Error() != utils.ErrResourceUnavailable.Error() {
+		argsRU, &reply); err.Error() != utils.ErrResourceUnauthorized.Error() {
 		t.Error(err)
 	}
 }
diff --git a/engine/resources.go b/engine/resources.go
index db9876a3f..a0b033c8a 100755
--- a/engine/resources.go
+++ b/engine/resources.go
@@ -549,6 +549,7 @@ func (rS *ResourceService) V1AuthorizeResources(args utils.ArgRSv1ResourceUsage,
 			ID:     args.UsageID,
 			Units:  args.Units}, true); err != nil {
 		if err == utils.ErrResourceUnavailable {
+			err = utils.ErrResourceUnauthorized
 			cache.Set(utils.EventResourcesPrefix+args.UsageID, nil, true, "")
 			return
 		}
@@ -574,7 +575,10 @@ func (rS *ResourceService) V1AllocateResource(args utils.ArgRSv1ResourceUsage, r
 	alcMsg, err := mtcRLs.allocateResource(
 		&ResourceUsage{Tenant: args.CGREvent.Tenant, ID: args.UsageID, Units: args.Units}, false)
 	if err != nil {
-		return err
+		if err == utils.ErrResourceUnavailable {
+			err = utils.ErrResourceUnalocated
+		}
+		return
 	}
 
 	// index it for matching out of cache
diff --git a/utils/errors.go b/utils/errors.go
index a2b813d21..71c236083 100644
--- a/utils/errors.go
+++ b/utils/errors.go
@@ -44,6 +44,8 @@ var (
 	ErrInsufficientCredit      = errors.New("INSUFFICIENT_CREDIT")
 	ErrNotConvertible          = errors.New("NOT_CONVERTIBLE")
 	ErrResourceUnavailable     = errors.New("RESOURCE_UNAVAILABLE")
+	ErrResourceUnauthorized    = errors.New("RESOURCE_UNAUTHORIZED")
+	ErrResourceUnalocated      = errors.New("RESOURCE_UNALOCATED")
 	ErrNoActiveSession         = errors.New("NO_ACTIVE_SESSION")
 	ErrPartiallyExecuted       = errors.New("PARTIALLY_EXECUTED")
 	ErrMaxUsageExceeded        = errors.New("MAX_USAGE_EXCEEDED")