diff --git a/models/resources/interfaces.go b/models/resources/interfaces.go
index dcb4d10..501354b 100755
--- a/models/resources/interfaces.go
+++ b/models/resources/interfaces.go
@@ -20,6 +20,7 @@ type ResourceInterface interface {
 	SetAllowedInstances(request *tools.APIRequest)
 	AddInstances(instance ResourceInstanceITF)
 	RefineResourceByPartnership(peerID string) ResourceInterface
+	GetSignature() string
 }
 
 type ResourceInstanceITF interface {
diff --git a/models/resources/resource.go b/models/resources/resource.go
index 5c13739..e6cd778 100755
--- a/models/resources/resource.go
+++ b/models/resources/resource.go
@@ -30,6 +30,10 @@ type AbstractResource struct {
 	Signature            string                                            `bson:"signature" json:"signature"`
 }
 
+func (abs *AbstractResource) GetSignature() string {
+	return abs.Signature
+}
+
 func (abs *AbstractResource) FilterPeer(peerID string) *dbs.Filters {
 	return nil
 }