diff --git a/sale_quotation_number/models/sale_order.py b/sale_quotation_number/models/sale_order.py
index a82c1478395c..23837f347af3 100644
--- a/sale_quotation_number/models/sale_order.py
+++ b/sale_quotation_number/models/sale_order.py
@@ -38,7 +38,10 @@ def copy(self, default=None):
 
     def action_confirm(self):
         for order in self:
-            if self.name[:2] != "SQ":
+            sequence = self.env["ir.sequence"].search(
+                [("code", "=", "sale.quotation")], limit=1
+            )
+            if sequence and self.name[: len(sequence.prefix)] != sequence.prefix:
                 continue
             if order.state not in ("draft", "sent") or order.company_id.keep_name_so:
                 continue