diff --git a/code/API_definitions/qod-api.yaml b/code/API_definitions/qod-api.yaml
index 21e0e27e88..ea3c1d69e3 100644
--- a/code/API_definitions/qod-api.yaml
+++ b/code/API_definitions/qod-api.yaml
@@ -141,6 +141,15 @@ paths:
           $ref: "#/components/responses/Generic403"
         "404":
           $ref: "#/components/responses/SessionNotFound404"
+        "500":
+          description: Server error
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ErrorInfo"
+              example:
+                code: INTERNAL
+                message: "Could not get session information"
         "503":
           $ref: "#/components/responses/Generic503"
     delete:
@@ -164,6 +173,15 @@ paths:
           $ref: "#/components/responses/Generic403"
         "404":
           $ref: "#/components/responses/SessionNotFound404"
+        "500":
+          description: Server error
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ErrorInfo"
+              example:
+                code: INTERNAL
+                message: "Session could not be deleted"
         "503":
           $ref: "#/components/responses/Generic503"
   /notifications:
@@ -191,6 +209,15 @@ paths:
           $ref: "#/components/responses/Generic401"
         "403":
           $ref: "#/components/responses/Generic403"
+        "500":
+          description: Server error
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/ErrorInfo"
+              example:
+                code: INTERNAL
+                message: "Failed to handle notification"
         "503":
           $ref: "#/components/responses/Generic503"
       security:
diff --git a/documentation/API_documentation/QoD_API.md b/documentation/API_documentation/QoD_API.md
index b717817691..ec19dc6a3d 100644
--- a/documentation/API_documentation/QoD_API.md
+++ b/documentation/API_documentation/QoD_API.md
@@ -190,7 +190,7 @@ Following table defines API endpoints of exposed REST based for QoD management o
         </tr>
         <tr>
             <td><b>503: Service temporarily unavailable</b></td>
-        </tr>    
+        </tr>
     </tbody>
 </table>
 
@@ -222,7 +222,7 @@ Following table defines API endpoints of exposed REST based for QoD management o
             <td colspan=2>No request body parameters are defined</td>
         </tr>
         <tr>
-            <td rowspan=5><b>Response</b></td>
+            <td rowspan=6><b>Response</b></td>
             <td><b>200: Session information returned</b></td>
             <td>
                 Response body:<br> 
@@ -247,6 +247,9 @@ Following table defines API endpoints of exposed REST based for QoD management o
         <tr>
             <td><b>404: Session not found</b></td>
         </tr>
+        <tr>
+            <td><b>500: Server Error</b></td>
+        </tr>
         <tr>
             <td><b>503: Service temporarily unavailable</b></td>
         </tr>    
@@ -281,7 +284,7 @@ Following table defines API endpoints of exposed REST based for QoD management o
             <td colspan=2>No request body parameters are defined</td>
         </tr>
         <tr>
-            <td rowspan=5><b>Response</b></td>
+            <td rowspan=6><b>Response</b></td>
             <td><b>204: Session deleted</b></td>
         </tr>
         <tr>
@@ -293,9 +296,12 @@ Following table defines API endpoints of exposed REST based for QoD management o
         <tr>
             <td><b>404: Session not found</b></td>
         </tr>
+        <tr>
+            <td><b>500: Server Error</b></td>
+        </tr>
         <tr>
             <td><b>503: Service temporarily unavailable</b></td>
-        </tr>    
+        </tr>
     </tbody>
 </table>