diff --git a/l10n_it_declaration_of_intent/models/account_move.py b/l10n_it_declaration_of_intent/models/account_move.py
index 59f690f453b3..981a7f77df46 100644
--- a/l10n_it_declaration_of_intent/models/account_move.py
+++ b/l10n_it_declaration_of_intent/models/account_move.py
@@ -158,18 +158,10 @@ def update_declarations(self, declarations_used_amounts, grouped_lines):
                     if is_sale_document:
                         cmt = self.narration or ""
                         msg = (
-                            "Vostra dichiarazione d'intento nr "
-                            "{partner_number} del {partner_date}, "
-                            "nostro protocollo nr {number} del {date}, "
-                            "protocollo telematico nr {protocol}.".format(
-                                partner_number=declaration.partner_document_number,
-                                partner_date=format_date(
-                                    self.env, declaration.partner_document_date
-                                ),
-                                number=declaration.number,
-                                date=format_date(self.env, declaration.date),
-                                protocol=declaration.telematic_protocol,
-                            )
+                            f"Vostra dichiarazione d'intento del "
+                            f"{format_date(self.env, declaration.date)}, "
+                            f"protocollo telematico nr "
+                            f"{declaration.telematic_protocol}."
                         )
                         # Avoid duplication
                         if msg not in cmt:
diff --git a/l10n_it_declaration_of_intent/models/declaration.py b/l10n_it_declaration_of_intent/models/declaration.py
index aadfc4345446..027749620286 100644
--- a/l10n_it_declaration_of_intent/models/declaration.py
+++ b/l10n_it_declaration_of_intent/models/declaration.py
@@ -53,10 +53,10 @@ def _default_currency(self):
     partner_id = fields.Many2one("res.partner", string="Partner", required=True)
     telematic_protocol = fields.Char(required=True)
     partner_document_number = fields.Char(
-        required=True, string="Document Number", help="Number of partner's document"
+        string="Document Number", help="Number of partner's document"
     )
     partner_document_date = fields.Date(
-        required=True, string="Document Date", help="Date of partner's document"
+        string="Document Date", help="Date of partner's document"
     )
     taxes_ids = fields.Many2many("account.tax", string="Taxes", required=True)
     used_amount = fields.Monetary(compute="_compute_amounts", store=True)
diff --git a/l10n_it_declaration_of_intent/tests/test_declaration_of_intent.py b/l10n_it_declaration_of_intent/tests/test_declaration_of_intent.py
index 5ee7928628d8..19ee55353b4f 100644
--- a/l10n_it_declaration_of_intent/tests/test_declaration_of_intent.py
+++ b/l10n_it_declaration_of_intent/tests/test_declaration_of_intent.py
@@ -19,8 +19,6 @@ def _create_declaration(cls, partner, type_d):
         return cls.env["l10n_it_declaration_of_intent.declaration"].create(
             {
                 "partner_id": partner.id,
-                "partner_document_number": "PartnerTest%s" % partner.id,
-                "partner_document_date": cls.today_date,
                 "date": cls.today_date,
                 "date_start": cls.today_date,
                 "date_end": cls.today_date,
diff --git a/l10n_it_fatturapa_out_di/tests/data/IT06363391001_00001.xml b/l10n_it_fatturapa_out_di/tests/data/IT06363391001_00001.xml
index f1c788d9bfdf..d76aac44c98a 100644
--- a/l10n_it_fatturapa_out_di/tests/data/IT06363391001_00001.xml
+++ b/l10n_it_fatturapa_out_di/tests/data/IT06363391001_00001.xml
@@ -68,7 +68,7 @@
                 <Data>2016-06-15</Data>
                 <Numero>INV/2016/00001</Numero>
                 <ImportoTotaleDocumento>14.00</ImportoTotaleDocumento>
-                <Causale>Vostra dichiarazione d'intento nr DI/111 del 06/15/2016, nostro protocollo nr 1 del 06/15/2016, protocollo telematico nr 08060120341234567-000001.</Causale>
+                <Causale>Vostra dichiarazione d'intento del 06/15/2016, protocollo telematico nr 08060120341234567-000001.</Causale>
                 <Art73>SI</Art73>
             </DatiGeneraliDocumento>
         </DatiGenerali>
diff --git a/l10n_it_fatturapa_out_di/tests/data/IT06363391001_00002.xml b/l10n_it_fatturapa_out_di/tests/data/IT06363391001_00002.xml
index 52b826dbd55a..962f01376ab4 100644
--- a/l10n_it_fatturapa_out_di/tests/data/IT06363391001_00002.xml
+++ b/l10n_it_fatturapa_out_di/tests/data/IT06363391001_00002.xml
@@ -68,7 +68,7 @@
                 <Data>2016-06-15</Data>
                 <Numero>INV/2016/00001</Numero>
                 <ImportoTotaleDocumento>14.00</ImportoTotaleDocumento>
-                <Causale>Vostra dichiarazione d'intento nr DI/111 del 06/15/2016, nostro protocollo nr 1 del 06/15/2016, protocollo telematico nr 08060120341234567-000001.</Causale>
+                <Causale>Vostra dichiarazione d'intento del 06/15/2016, protocollo telematico nr 08060120341234567-000001.</Causale>
                 <Art73>SI</Art73>
             </DatiGeneraliDocumento>
         </DatiGenerali>
diff --git a/l10n_it_fatturapa_out_di/tests/data/IT06363391001_00003.xml b/l10n_it_fatturapa_out_di/tests/data/IT06363391001_00003.xml
index cac6d165790c..73c8811902ce 100644
--- a/l10n_it_fatturapa_out_di/tests/data/IT06363391001_00003.xml
+++ b/l10n_it_fatturapa_out_di/tests/data/IT06363391001_00003.xml
@@ -68,7 +68,7 @@
                 <Data>2016-06-15</Data>
                 <Numero>INV/2016/00001</Numero>
                 <ImportoTotaleDocumento>14.00</ImportoTotaleDocumento>
-                <Causale>Vostra dichiarazione d'intento nr DI/112 del 06/15/2016, nostro protocollo nr 1 del 06/15/2016, protocollo telematico nr 08060120341234567-000002.</Causale>
+                <Causale>Vostra dichiarazione d'intento del 06/15/2016, protocollo telematico nr 08060120341234567-000002.</Causale>
                 <Art73>SI</Art73>
             </DatiGeneraliDocumento>
         </DatiGenerali>