diff --git a/auth_signup_verify_email/controllers/main.py b/auth_signup_verify_email/controllers/main.py
index 3c1564b5dc..aa8de15813 100644
--- a/auth_signup_verify_email/controllers/main.py
+++ b/auth_signup_verify_email/controllers/main.py
@@ -6,6 +6,7 @@
 from email_validator import EmailSyntaxError, EmailUndeliverableError, validate_email
 
 from odoo import _
+from odoo.exceptions import UserError, ValidationError
 from odoo.http import request, route
 
 from odoo.addons.auth_signup.controllers.main import AuthSignupHome
@@ -21,9 +22,23 @@ def web_auth_signup(self, *args, **kw):
         return super().web_auth_signup(*args, **kw)
 
     def passwordless_signup(self):
-        values = request.params
+        values = dict(request.params)
         qcontext = self.get_auth_signup_qcontext()
 
+        verify_captcha = getattr(
+            request.env["ir.http"], "_verify_request_recaptcha_token", None
+        )
+        if verify_captcha:
+            try:
+                if not verify_captcha("signup"):
+                    qcontext["error"] = _(
+                        "Suspicious activity detected by human verification."
+                    )
+                    return request.render("auth_signup.signup", qcontext)
+            except (UserError, ValidationError) as error:
+                qcontext["error"] = str(error)
+                return request.render("auth_signup.signup", qcontext)
+
         # Check good format of e-mail
         try:
             validate_email(values.get("login", ""))
@@ -44,8 +59,16 @@ def passwordless_signup(self):
             values["email"] = values.get("login")
 
         # remove values that could raise "Invalid field '*' on model 'res.users'"
-        values.pop("redirect", "")
-        values.pop("token", "")
+        for key in (
+            "redirect",
+            "token",
+            "csrf_token",
+            "confirm_password",
+            "turnstile_captcha",
+            "recaptcha_token_response",
+            "g-recaptcha-response",
+        ):
+            values.pop(key, "")
 
         # Remove password
         values["password"] = ""
diff --git a/auth_signup_verify_email/tests/test_verify_email.py b/auth_signup_verify_email/tests/test_verify_email.py
index 39a82073c0..754dd2370e 100644
--- a/auth_signup_verify_email/tests/test_verify_email.py
+++ b/auth_signup_verify_email/tests/test_verify_email.py
@@ -8,6 +8,7 @@
 except ImportError:
     from unittest.mock import patch
 
+from odoo.exceptions import UserError
 from odoo.tests.common import HttpCase
 from odoo.tools.misc import mute_logger
 
@@ -51,3 +52,38 @@ def test_good_email(self):
         self.data["login"] = "contributors@odoo-community.org"
         doc = self.html_doc(data=self.data)
         self.assertTrue(doc.xpath('//p[@class="alert alert-success"]'))
+
+    @mute_logger("odoo.addons.auth_signup_verify_email.controllers.main")
+    def test_good_email_with_captcha_fields(self):
+        """Test acceptance when captcha fields are present in POST data."""
+        self.data["login"] = "contributors@odoo-community.org"
+        self.data["turnstile_captcha"] = "dummy-turnstile-token"
+        self.data["recaptcha_token_response"] = "dummy-recaptcha-token"
+        doc = self.html_doc(data=self.data)
+        self.assertTrue(doc.xpath('//p[@class="alert alert-success"]'))
+
+    @mute_logger("odoo.addons.auth_signup_verify_email.controllers.main")
+    def test_captcha_verification_error(self):
+        """Test rejection when captcha verification raises an error."""
+        self.data["login"] = "contributors@odoo-community.org"
+        with patch.object(
+            type(self.env["ir.http"]),
+            "_verify_request_recaptcha_token",
+            side_effect=UserError("Captcha failed"),
+            create=True,
+        ):
+            doc = self.html_doc(data=self.data)
+        self.assertTrue(doc.xpath('//p[@class="alert alert-danger"]'))
+
+    @mute_logger("odoo.addons.auth_signup_verify_email.controllers.main")
+    def test_captcha_verification_false(self):
+        """Test rejection when captcha verification returns False."""
+        self.data["login"] = "contributors@odoo-community.org"
+        with patch.object(
+            type(self.env["ir.http"]),
+            "_verify_request_recaptcha_token",
+            return_value=False,
+            create=True,
+        ):
+            doc = self.html_doc(data=self.data)
+        self.assertTrue(doc.xpath('//p[@class="alert alert-danger"]'))