diff --git a/shopinvader_api_signin_jwt/README.rst b/shopinvader_api_signin_jwt/README.rst
index d9b9dd5b6c..91d3e860f3 100644
--- a/shopinvader_api_signin_jwt/README.rst
+++ b/shopinvader_api_signin_jwt/README.rst
@@ -7,7 +7,7 @@ Shopinvader Api Signin JWT
    !! This file is generated by oca-gen-addon-readme !!
    !! changes will be overwritten.                   !!
    !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-   !! source digest: sha256:59c45a1d4cbece13c06acf5a0b621bf113fd94ed74b05de2143494c755320354
+   !! source digest: sha256:7337f1eba6afcff7201a9185515fa52033fa3c544861e8b59aa71ed2545d6a7b
    !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 
 .. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
@@ -25,6 +25,11 @@ Shopinvader Api Signin JWT
 This addon adds a web API to signin into the application and create a partner
 if the email in the jwt payload is unknown.
 
+This addon supports the "anonymous partner" feature, which allows to create
+carts for user that are not loggedin.
+When you login from an anonymous partner, your cart is transfered to your real
+partner, and your anonymous partner is deleted.
+
 **Table of contents**
 
 .. contents::
diff --git a/shopinvader_api_signin_jwt/readme/DESCRIPTION.rst b/shopinvader_api_signin_jwt/readme/DESCRIPTION.rst
index 9d807c0111..6c7b1254c9 100644
--- a/shopinvader_api_signin_jwt/readme/DESCRIPTION.rst
+++ b/shopinvader_api_signin_jwt/readme/DESCRIPTION.rst
@@ -1,2 +1,7 @@
 This addon adds a web API to signin into the application and create a partner
 if the email in the jwt payload is unknown.
+
+This addon supports the "anonymous partner" feature, which allows to create
+carts for user that are not loggedin.
+When you login from an anonymous partner, your cart is transfered to your real
+partner, and your anonymous partner is deleted.
diff --git a/shopinvader_api_signin_jwt/routers/signin.py b/shopinvader_api_signin_jwt/routers/signin.py
index 89bac0a70d..51c67882ec 100644
--- a/shopinvader_api_signin_jwt/routers/signin.py
+++ b/shopinvader_api_signin_jwt/routers/signin.py
@@ -34,6 +34,7 @@ def signin(
     Authenticate the partner based on a JWT token or a session cookie.
     Set the session cookie if allowed.
     Return HTTP code 201 if res.partner created (case of the first signin).
+    Promote anonymous partner and delete it if any.
     """
     if not partner:
         partner = env[
@@ -41,6 +42,8 @@ def signin(
         ]._create_partner_from_payload(payload)
         response.status_code = status.HTTP_201_CREATED
 
+    env["res.partner"]._promote_anonymous_partner(partner, request.cookies, response)
+
 
 @signin_router.post("/signout")
 def signout(
diff --git a/shopinvader_api_signin_jwt/static/description/index.html b/shopinvader_api_signin_jwt/static/description/index.html
index f80480721d..d3c5876259 100644
--- a/shopinvader_api_signin_jwt/static/description/index.html
+++ b/shopinvader_api_signin_jwt/static/description/index.html
@@ -9,11 +9,10 @@
 
 /*
 :Author: David Goodger (goodger@python.org)
-:Id: $Id: html4css1.css 9511 2024-01-13 09:50:07Z milde $
+:Id: $Id: html4css1.css 8954 2022-01-20 10:10:25Z milde $
 :Copyright: This stylesheet has been placed in the public domain.
 
 Default cascading style sheet for the HTML output of Docutils.
-Despite the name, some widely supported CSS2 features are used.
 
 See https://docutils.sourceforge.io/docs/howto/html-stylesheets.html for how to
 customize this style sheet.
@@ -276,7 +275,7 @@
   margin-left: 2em ;
   margin-right: 2em }
 
-pre.code .ln { color: gray; } /* line numbers */
+pre.code .ln { color: grey; } /* line numbers */
 pre.code, code { background-color: #eeeeee }
 pre.code .comment, code .comment { color: #5C6576 }
 pre.code .keyword, code .keyword { color: #3B0D06; font-weight: bold }
@@ -302,7 +301,7 @@
 span.pre {
   white-space: pre }
 
-span.problematic, pre.problematic {
+span.problematic {
   color: red }
 
 span.section-subtitle {
@@ -368,11 +367,15 @@ <h1 class="title">Shopinvader Api Signin JWT</h1>
 !! This file is generated by oca-gen-addon-readme !!
 !! changes will be overwritten.                   !!
 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-!! source digest: sha256:59c45a1d4cbece13c06acf5a0b621bf113fd94ed74b05de2143494c755320354
+!! source digest: sha256:d2a37ed8f608aa991e96f29205867b36c47bf9ec58fd392ec4ee8d6f386da0f2
 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -->
 <p><a class="reference external image-reference" href="https://odoo-community.org/page/development-status"><img alt="Beta" src="https://img.shields.io/badge/maturity-Beta-yellow.png" /></a> <a class="reference external image-reference" href="http://www.gnu.org/licenses/agpl-3.0-standalone.html"><img alt="License: AGPL-3" src="https://img.shields.io/badge/licence-AGPL--3-blue.png" /></a> <a class="reference external image-reference" href="https://github.com/shopinvader/odoo-shopinvader/tree/16.0/shopinvader_api_signin_jwt"><img alt="shopinvader/odoo-shopinvader" src="https://img.shields.io/badge/github-shopinvader%2Fodoo--shopinvader-lightgray.png?logo=github" /></a></p>
 <p>This addon adds a web API to signin into the application and create a partner
 if the email in the jwt payload is unknown.</p>
+<p>This addon supports the “anonymous partner” feature, which allows to create
+carts for user that are not loggedin.
+When you login from an anonymous partner, your cart is transfered to your real
+partner, and your anonymous partner is deleted.</p>
 <p><strong>Table of contents</strong></p>
 <div class="contents local topic" id="contents">
 <ul class="simple">
diff --git a/shopinvader_api_signin_jwt/tests/test_signin.py b/shopinvader_api_signin_jwt/tests/test_signin.py
index 3243e0283c..39ffa4ebbe 100644
--- a/shopinvader_api_signin_jwt/tests/test_signin.py
+++ b/shopinvader_api_signin_jwt/tests/test_signin.py
@@ -7,6 +7,7 @@
 
 from odoo.addons.fastapi.tests.common import FastAPITransactionCase
 from odoo.addons.fastapi_auth_jwt.dependencies import auth_jwt_default_validator_name
+from odoo.addons.shopinvader_anonymous_partner.models.res_partner import COOKIE_NAME
 
 from ..routers import signin_router
 
@@ -79,6 +80,38 @@ def test_signin(self):
             res = client.post("/signin", headers={"Authorization": token})
         self.assertEqual(res.status_code, 200)
 
+    def test_signin_anonymous_cart(self):
+        anonymous_partner = self.env["res.partner"].create(
+            {"name": "Test anonymous", "anonymous_token": "1234", "active": False}
+        )
+        product = self.env["product.product"].create(
+            {"name": "product", "uom_id": self.env.ref("uom.product_uom_unit").id}
+        )
+        anonymous_cart = self.env["sale.order"].create(
+            {
+                "partner_id": anonymous_partner.id,
+                "order_line": [
+                    (0, 0, {"product_id": product.id, "product_uom_qty": 1}),
+                ],
+                "typology": "cart",
+            }
+        )
+
+        token = self._get_token()
+        with self._create_test_client() as client:
+            res = client.post(
+                "/signin",
+                headers={"Authorization": token},
+                cookies={COOKIE_NAME: "1234"},
+            )
+        self.assertFalse(res.cookies.get(COOKIE_NAME))
+        self.assertFalse(anonymous_partner.exists())
+        self.assertFalse(anonymous_cart.exists())
+        partner = self.env["res.partner"].search([("email", "=", "test@mail.com")])
+        cart = self.env["sale.order"].search([("partner_id", "=", partner.id)])
+        self.assertEqual(len(cart.order_line), 1)
+        self.assertEqual(cart.order_line[0].product_id, product)
+
     def test_signout(self):
         self.validator.write({"cookie_enabled": True, "cookie_name": "test_cookie"})
         token = self._get_token()