diff --git a/api/kiwi_vpn_api/db/models.py b/api/kiwi_vpn_api/db/models.py
index 633e78a..f9b6afa 100644
--- a/api/kiwi_vpn_api/db/models.py
+++ b/api/kiwi_vpn_api/db/models.py
@@ -24,10 +24,10 @@ class User(ORMBaseModel):
         "UserCapability", lazy="joined", cascade="all, delete-orphan"
     )
     certificates: list[Certificate] = relationship(
-        "Certificate", lazy="select"
+        "Certificate", lazy="select",  back_populates="owner"
     )
     distinguished_names: list[DistinguishedName] = relationship(
-        "DistinguishedName", lazy="select"
+        "DistinguishedName", lazy="select", back_populates="owner"
     )
 
     @classmethod
@@ -69,6 +69,10 @@ class DistinguishedName(ORMBaseModel):
     email = Column(String)
     common_name = Column(String, nullable=False)
 
+    owner: User = relationship(
+        "User", lazy="joined", back_populates="distinguished_names"
+    )
+
     UniqueConstraint(
         country,
         state,
@@ -96,3 +100,7 @@ class Certificate(ORMBaseModel):
     distinguished_name: DistinguishedName = relationship(
         "DistinguishedName", lazy="joined"
     )
+
+    owner: User = relationship(
+        "User", lazy="joined", back_populates="certificates"
+    )