If Application.Match(UF_Départs.TB_Correspondant.Value, .[J:J], 0) Then
If IsNumeric(Application.Match(UF_Départs.TB_Numero.Value, .[AC:AC], 0)) Then
If Application.Index(.[AC:AC], Application.Match(UF_Départs.TB_Correspondant.Value, .[J:J], 0)) = _
UF_Départs.TB_Numero.Value Then
MsgBox "Dossier déjà existant"
Exit Sub
End If
End If
End If