diff --git a/ems-core/src/main/resources/rules/documenti.drl b/ems-core/src/main/resources/rules/documenti.drl
index a6b4e58669..44a9f59cf6 100644
--- a/ems-core/src/main/resources/rules/documenti.drl
+++ b/ems-core/src/main/resources/rules/documenti.drl
@@ -67,15 +67,14 @@ then
 	}
 end
 
-
-
 rule "deleteDatiDocValV"
 no-loop
 when
-	eval(completeRulesEnabled)
-	$docT : DtbDoct(previstaFat == "S" && serDoc.equalsIgnoreCase(serDocVal) &&
-	                numDoc.equals(numDocVal) && dataDoc.equals(dataDocVal) &&
-	                codDtip.equalsIgnoreCase(codDtipVal))
+    eval(completeRulesEnabled)
+    $docT : DtbDoct(previstaFat == "S" && serDocVal != null && numDoc != null && codDtipVal != null &&
+                    serDoc == serDocVal &&
+                    numDoc == numDocVal && dataDoc == dataDocVal &&
+                    codDtip == codDtipVal)
 then
 	modify ( $docT ) {
 		setDataDocVal(EmsRestConstants.DATE_NULL),