diff --git a/src/main/java/org/gcube/informationsystem/resourceregistry/instances/model/entities/FacetManagement.java b/src/main/java/org/gcube/informationsystem/resourceregistry/instances/model/entities/FacetManagement.java
index a650ba4..b3881de 100644
--- a/src/main/java/org/gcube/informationsystem/resourceregistry/instances/model/entities/FacetManagement.java
+++ b/src/main/java/org/gcube/informationsystem/resourceregistry/instances/model/entities/FacetManagement.java
@@ -1,5 +1,7 @@
 package org.gcube.informationsystem.resourceregistry.instances.model.entities;
 
+import java.util.Set;
+
 import org.gcube.com.fasterxml.jackson.databind.JsonNode;
 import org.gcube.informationsystem.base.reference.AccessType;
 import org.gcube.informationsystem.model.reference.entities.Facet;
@@ -8,6 +10,11 @@ import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegis
 import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.facet.FacetAlreadyPresentException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.facet.FacetAvailableInAnotherContextException;
 import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.facet.FacetNotFoundException;
+import org.gcube.informationsystem.resourceregistry.api.exceptions.schema.SchemaViolationException;
+import org.gcube.informationsystem.resourceregistry.types.CachedType;
+import org.gcube.informationsystem.resourceregistry.types.TypesCache;
+import org.gcube.informationsystem.types.reference.entities.FacetType;
+import org.gcube.informationsystem.types.reference.properties.PropertyDefinition;
 
 import com.orientechnologies.orient.core.record.OVertex;
 
@@ -58,10 +65,62 @@ public class FacetManagement extends EntityManagement<Facet> {
 		getElement().delete();
 		return true;
 	}
-
+	
+	private String getNotNullErrorMessage(String fieldName) {
+		StringBuffer stringBuffer = new StringBuffer();
+		stringBuffer.append("The type ");
+		stringBuffer.append(typeName);
+		stringBuffer.append(" defines the fields ");
+		stringBuffer.append(fieldName);
+		stringBuffer.append(" as not nullable. Null or no value has been provided instead.");
+		return stringBuffer.toString();
+	}
+	
+	private String getMandatoryErrorMessage(String fieldName) {
+		StringBuffer stringBuffer = new StringBuffer();
+		stringBuffer.append("The type ");
+		stringBuffer.append(typeName);
+		stringBuffer.append(" defines the fields ");
+		stringBuffer.append(fieldName);
+		stringBuffer.append(" as mandatory but no value has been provided.");
+		return stringBuffer.toString();
+	}
+	
 	@Override
-	public void sanityCheck() throws ResourceRegistryException {
-		// TODO Auto-generated method stub
+	public void sanityCheck() throws SchemaViolationException, ResourceRegistryException {
+		// OrientDB distributed mode does not support 
+		// mandatory and notnull constraints due to technical problem
+		// https://www.orientdb.com/docs/last/java/Graph-Schema-Property.html#using-constraints
+		// Going to validate them here
+		
+		JsonNode facetInstance = createCompleteJsonNode();
+		
+		TypesCache typesCache = TypesCache.getInstance();
+		CachedType cachedType = typesCache.getCachedType(typeName);
+		FacetType facetType = (FacetType) cachedType.getType();
+		Set<PropertyDefinition> definedProperties = facetType.getProperties();
+		for(PropertyDefinition propertyDefinition : definedProperties) {
+			String fieldName = propertyDefinition.getName();
+			
+			if(propertyDefinition.isMandatory() && !facetInstance.has(fieldName)) {
+				if(propertyDefinition.isNotnull()) {
+					// If the field is mandatory but null value is accepted I add the
+					// field as null value
+					element.setProperty(fieldName, null);
+				} else {
+					throw new SchemaViolationException(getMandatoryErrorMessage(fieldName));
+				}
+			}
+			
+			JsonNode jsonNode = facetInstance.get(fieldName);
+			
+			if(!propertyDefinition.isNotnull() && jsonNode==null) {
+				throw new SchemaViolationException(getNotNullErrorMessage(fieldName));
+			}
+			
+			// leaving the rest of validation to OrientDB
+			
+		}
 		
 	}