diff --git a/product_contract/models/product_template.py b/product_contract/models/product_template.py
index 1d06c07886..75c579376b 100644
--- a/product_contract/models/product_template.py
+++ b/product_contract/models/product_template.py
@@ -167,3 +167,55 @@ def _check_contract_product_type(self):
         """
         if any([product.is_contract and product.type != "service" for product in self]):
             raise ValidationError(_("Contract product should be service type"))
+
+    @api.constrains("recurrence_number")
+    def _check_recurrence_number_is_strictly_positive(self):
+        for product in self:
+            if not product.is_contract:
+                continue
+            if product.recurrence_number <= 0:
+                raise ValidationError(
+                    _(
+                        "Value of %r should be strictly positive",
+                        product._fields["recurrence_number"].string,
+                    )
+                )
+
+    @api.constrains("recurring_interval")
+    def _check_recurring_interval_is_strictly_positive(self):
+        for product in self:
+            if not product.is_contract:
+                continue
+            if product.recurring_interval <= 0:
+                raise ValidationError(
+                    _(
+                        "Value of %r should be strictly positive",
+                        product._fields["recurring_interval"].string,
+                    )
+                )
+
+    @api.constrains("auto_renew_interval")
+    def _check_auto_renew_interval_is_strictly_positive(self):
+        for product in self:
+            if not product.is_contract or not product.is_auto_renew:
+                continue
+            if product.auto_renew_interval <= 0:
+                raise ValidationError(
+                    _(
+                        "Value of %r should be strictly positive",
+                        product._fields["auto_renew_interval"].string,
+                    )
+                )
+
+    @api.constrains("termination_notice_interval")
+    def _check_termination_notice_interval_is_positive(self):
+        for product in self:
+            if not product.is_contract or not product.is_auto_renew:
+                continue
+            if product.termination_notice_interval < 0:
+                raise ValidationError(
+                    _(
+                        "Value of %r should be positive",
+                        product._fields["termination_notice_interval"].string,
+                    )
+                )
diff --git a/product_contract/models/sale_order_line_contract_mixin.py b/product_contract/models/sale_order_line_contract_mixin.py
index 58fc3fc6c5..2b9832ed7f 100644
--- a/product_contract/models/sale_order_line_contract_mixin.py
+++ b/product_contract/models/sale_order_line_contract_mixin.py
@@ -3,7 +3,8 @@
 
 from dateutil.relativedelta import relativedelta
 
-from odoo import api, fields, models
+from odoo import _, api, fields, models
+from odoo.exceptions import ValidationError
 
 
 class SaleOrderLineContractMixin(models.AbstractModel):
@@ -224,3 +225,42 @@ def _get_date_end(self):
             - relativedelta(days=1)
         )
         return date_end
+
+    @api.constrains("recurrence_number")
+    def _check_recurrence_number_is_strictly_positive(self):
+        for line in self:
+            if not line.is_contract:
+                return
+            if line.recurrence_number <= 0:
+                raise ValidationError(
+                    _(
+                        "Value of %r should be strictly positive",
+                        line._fields["recurrence_number"].string,
+                    )
+                )
+
+    @api.constrains("recurring_interval")
+    def _check_recurring_interval_is_strictly_positive(self):
+        for line in self:
+            if not line.is_contract:
+                return
+            if line.recurring_interval <= 0:
+                raise ValidationError(
+                    _(
+                        "Value of %r should be strictly positive",
+                        line._fields["recurring_interval"].string,
+                    )
+                )
+
+    @api.constrains("auto_renew_interval")
+    def _check_auto_renew_interval_is_strictly_positive(self):
+        for line in self:
+            if not line.is_contract or not line.is_auto_renew:
+                return
+            if line.auto_renew_interval <= 0:
+                raise ValidationError(
+                    _(
+                        "Value of %r should be strictly positive",
+                        line._fields["auto_renew_interval"].string,
+                    )
+                )
diff --git a/product_contract/tests/test_product.py b/product_contract/tests/test_product.py
index d5f1c767a4..da89e7be34 100644
--- a/product_contract/tests/test_product.py
+++ b/product_contract/tests/test_product.py
@@ -37,3 +37,55 @@ def test_check_contract_product_type(self):
         """
         with self.assertRaises(ValidationError):
             self.consu_product.is_contract = True
+
+    def test_check_recurrence_number_is_strictly_positive(self):
+        """
+        It should raise ValidationError if recurrence_number is not strictly positive
+        for a contract product
+        """
+        self.service_product.is_contract = True
+        self.service_product.property_contract_template_id = self.contract.id
+        with self.assertRaises(ValidationError):
+            self.service_product.recurrence_number = -1
+        with self.assertRaises(ValidationError):
+            self.service_product.recurrence_number = 0
+        self.service_product.recurrence_number = 1
+
+    def test_check_recurring_interval_is_strictly_positive(self):
+        """
+        It should raise ValidationError if recurring_interval is not strictly positive
+        for a contract product
+        """
+        self.service_product.is_contract = True
+        self.service_product.property_contract_template_id = self.contract.id
+        with self.assertRaises(ValidationError):
+            self.service_product.recurring_interval = -1
+        with self.assertRaises(ValidationError):
+            self.service_product.recurring_interval = 0
+        self.service_product.recurring_interval = 1
+
+    def test_check_auto_renew_interval_is_strictly_positive(self):
+        """
+        It should raise ValidationError if auto_renew_interval is not strictly positive
+        for a contract product
+        """
+        self.service_product.is_contract = True
+        self.service_product.is_auto_renew = True
+        self.service_product.property_contract_template_id = self.contract.id
+        with self.assertRaises(ValidationError):
+            self.service_product.auto_renew_interval = -1
+        with self.assertRaises(ValidationError):
+            self.service_product.auto_renew_interval = 0
+        self.service_product.auto_renew_interval = 1
+
+    def test_check_termination_notice_interval_is_positive(self):
+        """
+        It should raise ValidationError if termination_notice_interval is not positive
+        for a contract product
+        """
+        self.service_product.is_contract = True
+        self.service_product.is_auto_renew = True
+        self.service_product.property_contract_template_id = self.contract.id
+        with self.assertRaises(ValidationError):
+            self.service_product.termination_notice_interval = -1
+        self.service_product.termination_notice_interval = 0
diff --git a/product_contract/tests/test_sale_order.py b/product_contract/tests/test_sale_order.py
index 3bf8aac2e9..db6b3db645 100644
--- a/product_contract/tests/test_sale_order.py
+++ b/product_contract/tests/test_sale_order.py
@@ -669,3 +669,39 @@ def test_order_line_date_start_confirm(self):
             sale.order_line.contract_id.contract_line_ids.date_start,
             fields.Date.to_date("2025-02-28"),
         )
+
+    def test_check_recurrence_number_is_strictly_positive(self):
+        """
+        It should raise ValidationError if recurrence_number is not strictly positive
+        for a sale order line with a contract product
+        """
+        self.sale.order_line.is_auto_renew = True
+        with self.assertRaises(ValidationError):
+            self.sale.order_line.recurrence_number = -1
+        with self.assertRaises(ValidationError):
+            self.sale.order_line.recurrence_number = 0
+        self.sale.order_line.recurrence_number = 1
+
+    def test_check_recurring_interval_is_strictly_positive(self):
+        """
+        It should raise ValidationError if recurring_interval is not strictly positive
+        for a sale order line with a contract product
+        """
+        self.sale.order_line.is_auto_renew = True
+        with self.assertRaises(ValidationError):
+            self.sale.order_line.recurring_interval = -1
+        with self.assertRaises(ValidationError):
+            self.sale.order_line.recurring_interval = 0
+        self.sale.order_line.recurring_interval = 1
+
+    def test_check_auto_renew_interval_is_strictly_positive(self):
+        """
+        It should raise ValidationError if auto_renew_interval is not strictly positive
+        for a sale order line with a contract product
+        """
+        self.sale.order_line.is_auto_renew = True
+        with self.assertRaises(ValidationError):
+            self.sale.order_line.auto_renew_interval = -1
+        with self.assertRaises(ValidationError):
+            self.sale.order_line.auto_renew_interval = 0
+        self.sale.order_line.auto_renew_interval = 1