diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/context/ContextManagement.java b/src/main/java/org/gcube/informationsystem/resourceregistry/context/ContextManagement.java
index 5091b7d..811336a 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/context/ContextManagement.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/context/ContextManagement.java
@@ -60,10 +60,6 @@ public class ContextManagement extends EntityManagement<Context> {
 		getWorkingContext();
 	}
 	
-	public UUID getUUID() {
-		return uuid;
-	}
-	
 	public String getName() {
 		if(name == null) {
 			if(element == null) {
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/er/ERManagement.java b/src/main/java/org/gcube/informationsystem/resourceregistry/er/ERManagement.java
index 5b951f8..2ef3cc3 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/er/ERManagement.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/er/ERManagement.java
@@ -85,6 +85,10 @@ public abstract class ERManagement<ERType extends ER, El extends Element> {
 	protected El element;
 	protected boolean reload;
 	
+	public UUID getUUID() {
+		return uuid;
+	}
+	
 	public boolean isReload() {
 		return reload;
 	}
diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ERManager.java b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ERManager.java
index f984efb..705471e 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ERManager.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/rest/ERManager.java
@@ -2,6 +2,7 @@ package org.gcube.informationsystem.resourceregistry.rest;
 
 import java.util.UUID;
 
+import javax.mail.Header;
 import javax.ws.rs.Consumes;
 import javax.ws.rs.DELETE;
 import javax.ws.rs.POST;
@@ -21,6 +22,7 @@ import org.gcube.informationsystem.model.relation.ConsistsOf;
 import org.gcube.informationsystem.model.relation.IsRelatedTo;
 import org.gcube.informationsystem.resourceregistry.ResourceInitializer;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
+import org.gcube.informationsystem.resourceregistry.api.exceptions.context.ContextCreationException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.context.ContextNotFoundException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.facet.FacetAlreadyPresentException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.facet.FacetNotFoundException;
@@ -47,24 +49,34 @@ public class ERManager {
 	public static final String TYPE_PATH_PARAM = "type";
 	
 	/**
-	 * e.g. PUT /resource-registry/er/facet/ContactFacet
+	 * e.g. PUT /resource-registry/er/facets/ContactFacet
 	 * 
 	 * BODY: {...}
 	 * 
 	 */
 	@PUT
-	@Path(ERPath.FACETS_PATH_PART + "/{" + TYPE_PATH_PARAM + "}")
+	@Path(ERPath.FACET_PATH_PART + "/{" + TYPE_PATH_PARAM + "}")
 	@Consumes({MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8})
 	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public Response createFacet(@PathParam(TYPE_PATH_PARAM) String type, String json)
 			throws FacetAlreadyPresentException, ResourceRegistryException {
 		CalledMethodProvider.instance
-				.set(HTTPMETHOD.PUT.name() + " /" + ERPath.ER_PATH_PART + "/" + ERPath.FACETS_PATH_PART + "/" + type);
+				.set(HTTPMETHOD.PUT.name() + " /" + ERPath.ER_PATH_PART + "/" + ERPath.FACET_PATH_PART + "/" + type);
 		logger.info("Requested to create {} of type {}", Facet.NAME, type);
 		logger.trace("Requested to create {} of type {} defined by {} ", Facet.NAME, type, json);
 		FacetManagement facetManagement = new FacetManagement();
 		facetManagement.setElementType(type);
 		facetManagement.setJSON(json);
+		
+		UUID uuid = facetManagement.getUUID();
+		if(uuid!=null) {
+			String error = String.format("Could not specify an UUID in % to create a %s using POST. Please use PUT instead and specify the UUID as path argument.", 
+					Header.class.getSimpleName(), Facet.NAME);
+			logger.info(error);
+			throw new ContextCreationException(error);
+		}
+		
+		
 		String ret = facetManagement.create();
 		return Response.status(Status.CREATED).entity(ret).type(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 				.build();
@@ -77,13 +89,13 @@ public class ERManager {
 	 * 
 	 */
 	@POST
-	@Path(ERPath.FACETS_PATH_PART + "/{" + ID_PATH_PARAM + "}")
+	@Path(ERPath.FACET_PATH_PART + "/{" + ID_PATH_PARAM + "}")
 	@Consumes({MediaType.TEXT_PLAIN, ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8})
 	@Produces(ResourceInitializer.APPLICATION_JSON_CHARSET_UTF_8)
 	public String updateFacet(@PathParam(ID_PATH_PARAM) String uuid, String json)
 			throws FacetNotFoundException, ResourceRegistryException {
 		CalledMethodProvider.instance.set(HTTPMETHOD.POST.name() + " /" + ERPath.ER_PATH_PART + "/"
-				+ ERPath.FACETS_PATH_PART + "/{" + ID_PATH_PARAM + "}");
+				+ ERPath.FACET_PATH_PART + "/{" + ID_PATH_PARAM + "}");
 		logger.info("Requested to update {} with id {}", Facet.NAME, uuid);
 		logger.trace("Requested to update {} with id {} with json {}", Facet.NAME, uuid, json);
 		FacetManagement facetManagement = new FacetManagement();
@@ -97,11 +109,11 @@ public class ERManager {
 	 * 
 	 */
 	@DELETE
-	@Path(ERPath.FACETS_PATH_PART + "/{" + ID_PATH_PARAM + "}")
+	@Path(ERPath.FACET_PATH_PART + "/{" + ID_PATH_PARAM + "}")
 	public boolean deleteFacet(@PathParam(ID_PATH_PARAM) String uuid)
 			throws FacetNotFoundException, ResourceRegistryException {
 		CalledMethodProvider.instance.set(HTTPMETHOD.DELETE.name() + " /" + ERPath.ER_PATH_PART + "/"
-				+ ERPath.FACETS_PATH_PART + "/{" + ID_PATH_PARAM + "}");
+				+ ERPath.FACET_PATH_PART + "/{" + ID_PATH_PARAM + "}");
 		logger.info("Requested to delete {} with id {}", Facet.NAME, uuid);
 		FacetManagement facetManagement = new FacetManagement();
 		facetManagement.setUUID(UUID.fromString(uuid));
@@ -273,11 +285,11 @@ public class ERManager {
 	 * 
 	 */
 	@POST
-	@Path(ERPath.ADD_PATH_PART + "/" + ERPath.FACETS_PATH_PART + "/{" + ID_PATH_PARAM + "}")
+	@Path(ERPath.ADD_PATH_PART + "/" + ERPath.FACET_PATH_PART + "/{" + ID_PATH_PARAM + "}")
 	public boolean addFacetToContext(@PathParam(ID_PATH_PARAM) String uuid)
 			throws FacetNotFoundException, ContextNotFoundException, ResourceRegistryException {
 		CalledMethodProvider.instance.set(HTTPMETHOD.POST.name() + " /" + ERPath.ER_PATH_PART + "/"
-				+ ERPath.ADD_PATH_PART + "/" + ERPath.FACETS_PATH_PART + "/{" + ID_PATH_PARAM + "}");
+				+ ERPath.ADD_PATH_PART + "/" + ERPath.FACET_PATH_PART + "/{" + ID_PATH_PARAM + "}");
 		logger.info("Requested to add {} with UUID {} to current {}", Facet.NAME, uuid, Context.NAME);
 		FacetManagement facetManagement = new FacetManagement();
 		facetManagement.setUUID(UUID.fromString(uuid));
@@ -307,11 +319,11 @@ public class ERManager {
 	 * 
 	 */
 	@POST
-	@Path(ERPath.REMOVE_PATH_PART + "/" + ERPath.FACETS_PATH_PART + "/{" + ID_PATH_PARAM + "}")
+	@Path(ERPath.REMOVE_PATH_PART + "/" + ERPath.FACET_PATH_PART + "/{" + ID_PATH_PARAM + "}")
 	public boolean removeFacetFromContext(@PathParam(ID_PATH_PARAM) String uuid)
 			throws FacetNotFoundException, ContextNotFoundException, ResourceRegistryException {
 		CalledMethodProvider.instance.set(HTTPMETHOD.POST.name() + " /" + ERPath.ER_PATH_PART + "/"
-				+ ERPath.REMOVE_PATH_PART + "/" + ERPath.FACETS_PATH_PART + "/{" + ID_PATH_PARAM + "}");
+				+ ERPath.REMOVE_PATH_PART + "/" + ERPath.FACET_PATH_PART + "/{" + ID_PATH_PARAM + "}");
 		logger.info("Requested to remove {} with UUID {} from current {}", Facet.NAME, uuid, Context.NAME);
 		FacetManagement facetManagement = new FacetManagement();
 		facetManagement.setUUID(UUID.fromString(uuid));