diff --git a/src/m770/777200.cpp b/src/m770/777200.cpp
index 6200efeac..948bf968e 100755
--- a/src/m770/777200.cpp
+++ b/src/m770/777200.cpp
@@ -1016,6 +1016,18 @@ TTrasferimentoCU::TTrasferimentoCU(const char* path, char  mode)
 TTrasferimentoCU::~TTrasferimentoCU()
 { }
 
+
+HIDDEN bool key_handler(TMask& m, KEY k)
+{
+  // Per ora facciamo che il SHIFT+F12 attiva sempre il campo 3
+  if (k == K_SHIFT + K_F12)
+  {
+    m.reset(F_TESTEMAIL);
+    m.show(F_TESTEMAIL, !m.field(F_TESTEMAIL).shown());
+  }
+  return true;
+}
+
 ///////////////////////////////////////////////////////////
 // TCU_mask
 ///////////////////////////////////////////////////////////
@@ -1026,7 +1038,7 @@ protected:
   virtual bool on_field_event(TOperable_field& o, TField_event e, long jolly);
 
 public:
-  TInvio_CU_mask() : TAutomask("777200c") {}
+  TInvio_CU_mask() : TAutomask("777200c") { set_handler(key_handler); }
 };
 
 bool TInvio_CU_mask::on_field_event(TOperable_field& o, TField_event e, long jolly)
@@ -1056,7 +1068,7 @@ protected:
   void fill_row(TMask & m, const char * tipoa, long percip);
 
 public:
-  TCU_mask() : TAutomask("777200a") {}
+  TCU_mask() : TAutomask("777200a") { }
 };
 
 void TCU_mask::fill_row(TMask & m, const char * tipoa, long percip)
@@ -1106,6 +1118,7 @@ bool TCU_mask::on_field_event(TOperable_field& o, TField_event e, long jolly)
       TFilename f = o.get();
       f.add(CU_DEFAULT_NAME);
       enable(DLG_PREVIEW, f.exist());
+      enable(DLG_EMAIL, f.exist());
     }
     break;
   case DLG_PREVIEW:
@@ -1172,6 +1185,7 @@ bool TCU_mask::on_field_event(TOperable_field& o, TField_event e, long jolly)
             fill_row(m, tipoa, percip);
           if (m.run() == K_ENTER)
           {
+            set_test_mail(m.get(F_TESTEMAIL));
             FOR_EACH_SHEET_ITEM(sh, r)
             {
               if (sh.get_bool_row_cell(r, S_SELECTED))
@@ -1181,13 +1195,14 @@ bool TCU_mask::on_field_event(TOperable_field& o, TField_event e, long jolly)
                 email = sh.get_str_row_cell(r, S_EMAIL);
 
                 TString query;
+
                 query.format("USE %d SELECT (ANNO=%d)&&(TIPOA==\"%s\")&&(CODANAGR==%ld)\nBY TIPOA CODANAGR CAUSALE\nFROM CODDITTA=%ld\nTO CODDITTA=%ld",
                   LF_QUALA, anno, (const char *) tipoa, percip, codditta, codditta);
 
                 TISAM_recordset perc(query);
                 TString ragsoc = sh.get_str_row_cell(r, S_RAGSOC);
 
-                send_cu(perc, quality, simple, anno, tipoa, percip, email, ragsoc,  log);
+                send_cu(perc, quality, simple, anno, tipoa, percip, email, m.get(F_CCNEMAIL), ragsoc, m.get_bool(F_RECEIPT), log);
               }
             }
           }
@@ -1195,7 +1210,8 @@ bool TCU_mask::on_field_event(TOperable_field& o, TField_event e, long jolly)
       }
       else
         cantread_box(tmp);
-      log.print_or_preview();
+      if (log.rows() > 0)
+        log.print_or_preview();
       return false; // don't close mask
     }
     break;
diff --git a/src/m770/777200.h b/src/m770/777200.h
index 2679eee53..191a3dda9 100644
--- a/src/m770/777200.h
+++ b/src/m770/777200.h
@@ -86,7 +86,8 @@ public:
 };
 
 void print_cu(const TFilename& datafile, int quality, bool simple);
-void send_cu(TISAM_recordset& perc, int quality, bool syntetic, int anno, const char * tipoa, long percip, const char * email, const char * ragsoc, TLog_report & log);
+void send_cu(TISAM_recordset& perc, int quality, bool syntetic, int anno, const char * tipoa, long percip,
+             const char * email, const char * ccnemail, const char * ragsoc, bool receipt, TLog_report & log);
 void edit_cu(const TFilename& datafile, int quality, bool simple);
 
 #endif
\ No newline at end of file
diff --git a/src/m770/777200c.h b/src/m770/777200c.h
index 58fda9f12..6c3444818 100644
--- a/src/m770/777200c.h
+++ b/src/m770/777200c.h
@@ -1,4 +1,7 @@
 #define F_SHEET       201
+#define F_CCNEMAIL    202
+#define F_RECEIPT     203
+#define F_TESTEMAIL   204
 
 #define S_SELECTED    101
 #define S_EMAIL       102
diff --git a/src/m770/777200c.uml b/src/m770/777200c.uml
index fd86a12cf..ad17d27ff 100644
--- a/src/m770/777200c.uml
+++ b/src/m770/777200c.uml
@@ -20,9 +20,25 @@ ENDPAGE
 
 PAGE "Invio Certificazione unica" 0 2 0 0
 
+STRING F_CCNEMAIL 50
+BEGIN
+  PROMPT 1 1 "Email conoscenza "
+END 
+
+BOOLEAN F_RECEIPT
+BEGIN
+  PROMPT 70 1 "Ricevuta"
+END
+
+STRING F_TESTEMAIL 50
+BEGIN
+  PROMPT 1 2 "Email prova      "
+  FLAGS "H"
+END
+
 SPREADSHEET F_SHEET -1 -1
 BEGIN
-  PROMPT 0 2 ""
+  PROMPT 0 4 ""
   ITEM "@1"
   ITEM "Email@50"
   ITEM "Tipo"
diff --git a/src/m770/777201.cpp b/src/m770/777201.cpp
index 0584a20c7..708b4101a 100644
--- a/src/m770/777201.cpp
+++ b/src/m770/777201.cpp
@@ -924,7 +924,7 @@ void print_cu(const TFilename& datafile, int quality, bool syntetic)
   xvtil_statbar_set(NULL);
 }
 
-void send_cu(TISAM_recordset& perc, int quality, bool syntetic, int anno, const char * tipoa, long percip, const char * email, const char * ragsoc, TLog_report & log)
+void send_cu(TISAM_recordset& perc, int quality, bool syntetic, int anno, const char * tipoa, long percip, const char * email, const char * ccnemail, const char * ragsoc, bool receipt, TLog_report & log)
 {
   TCU_report cur(quality, syntetic, true);
   TFilename datafile; 
@@ -951,15 +951,15 @@ void send_cu(TISAM_recordset& perc, int quality, bool syntetic, int anno, const
 
   b.export_pdf(pdf, false);
 
-  TToken_string to(email, ';'), cc("", ';'), ccn("", ';'), attachment(pdf, ';');
+  TToken_string to(email, ';'), cc("", ';'), ccn(ccnemail, ';'), attachment(pdf, ';');
   TString msg("Invio a ");
   TString subj("Certificazione unica anno ");
   TString message("Certificazione anno ");
 
   subj << anno + 1;
-  message << anno + 1 << " di " << ragsoc;
+  message << anno + 1 << " di " << ragsoc << " (" << email << ")";
   msg << email;
-  if (!send_mail(to, cc, ccn, subj, message, attachment))
+  if (!send_mail(to, cc, ccn, subj, message, attachment, false, receipt))
     msg << " non ";
   else
     ini_set_bool(CONFIG_DITTA, "CU", format("%1s%6ld", (const char *)tipoa, percip), true);