diff --git a/lv/lv2500.cpp b/lv/lv2500.cpp
index 2aa0dbd47..1ad1662c4 100755
--- a/lv/lv2500.cpp
+++ b/lv/lv2500.cpp
@@ -1287,9 +1287,12 @@ void TFatturazione_lavanderie::post_process(TLista_documenti& doc_out, TLista_do
 			doc.put(DOC_CODCF, new_cli);
 			key = tipocf;
 			key.add(new_cli);
+			const TRectype & new_reccli = cache().get(LF_CLIFO, key);
 			const TRectype & new_reccliven = cache().get(LF_CFVEN, key);
 			TLaundry_contract contr(new_cli, doc.get_long(DOC_CODINDSP), _data_elab);
 
+			if (new_reccli.get_int(CLI_ALLEG) == 7 && new_reccliven.get_bool(CFV_FATTSOSP))
+				doc.put(DOC_LIQDIFF, "X");
 			doc.put(DOC_CODINDSP, new_reccliven.get(CFV_CODINDDOC));
 
 			TString descr;