diff --git a/src/main/java/eu/dnetlib/uoaorcidservice/controllers/WorkController.java b/src/main/java/eu/dnetlib/uoaorcidservice/controllers/WorkController.java
index 6514fd0..35b125c 100644
--- a/src/main/java/eu/dnetlib/uoaorcidservice/controllers/WorkController.java
+++ b/src/main/java/eu/dnetlib/uoaorcidservice/controllers/WorkController.java
@@ -7,6 +7,7 @@ import eu.dnetlib.uoaorcidservice.entities.ResultIdAndWork;
 import eu.dnetlib.uoaorcidservice.entities.UserTokens;
 import eu.dnetlib.uoaorcidservice.entities.Work;
 import eu.dnetlib.uoaorcidservice.handlers.ConflictException;
+import eu.dnetlib.uoaorcidservice.handlers.ContentNotFoundException;
 import eu.dnetlib.uoaorcidservice.services.UserTokensService;
 import eu.dnetlib.uoaorcidservice.services.WorkService;
 import org.apache.log4j.Logger;
diff --git a/src/main/java/eu/dnetlib/uoaorcidservice/handlers/ContentNotFoundException.java b/src/main/java/eu/dnetlib/uoaorcidservice/handlers/ContentNotFoundException.java
new file mode 100644
index 0000000..1c33369
--- /dev/null
+++ b/src/main/java/eu/dnetlib/uoaorcidservice/handlers/ContentNotFoundException.java
@@ -0,0 +1,11 @@
+package eu.dnetlib.uoaorcidservice.handlers;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ResponseStatus(HttpStatus.NOT_FOUND)
+public class ContentNotFoundException extends RuntimeException {
+    public ContentNotFoundException(String message){
+        super(message);
+    }
+}