diff --git a/oidc4vp/models.py b/oidc4vp/models.py
index ca449c7..66ceff1 100644
--- a/oidc4vp/models.py
+++ b/oidc4vp/models.py
@@ -168,7 +168,7 @@ class OAuth2VPToken(models.Model):
     authorization = models.ForeignKey(
         Authorization,
         on_delete=models.SET_NULL,
-        related_name='oauth2vptoken',
+        related_name='vp_tokens',
         null=True,
     )
 
@@ -176,10 +176,7 @@ class OAuth2VPToken(models.Model):
         code = kwargs.pop("code", None)
         super().__init__(*args, **kwargs)
         
-        self.authorization = get_object_or_404(
-                Authorization,
-                code=code
-        )
+        self.authorization = Authorization.objects.filter(code=code).first()
 
     def verifing(self):
         self.result_verify = verify_presentation(self.vp_token)
diff --git a/oidc4vp/views.py b/oidc4vp/views.py
index fd164bf..3f34bfd 100644
--- a/oidc4vp/views.py
+++ b/oidc4vp/views.py
@@ -40,7 +40,6 @@ class AuthorizeView(UserView, FormView):
         return kwargs
     
     def form_valid(self, form):
-        # import pdb; pdb.set_trace()
         authorization = form.save()
         if not authorization or authorization.status_code != 200:
             messages.error(self.request, _("Error sending credential!"))
@@ -67,7 +66,6 @@ class AuthorizeView(UserView, FormView):
         return super().form_valid(form)
 
     def get_org(self):
-        # import pdb; pdb.set_trace()
         client_id = self.request.GET.get("client_id")
         if not client_id:
             raise Http404("Organization not found!")
@@ -93,7 +91,6 @@ class VerifyView(View):
         return HttpResponse(res)
 
     def post(self, request, *args, **kwargs):
-        # import pdb; pdb.set_trace()
         code = self.request.POST.get("code")
         vp_tk = self.request.POST.get("vp_token")
 
@@ -107,6 +104,8 @@ class VerifyView(View):
             organization=org,
             code=code
         )
+        if not vp_token.authorization:
+            raise Http404("Page not Found!")
 
         vp_token.verifing()
         response = vp_token.get_response_verify()
diff --git a/promotion/views.py b/promotion/views.py
index fbc6343..79b47ea 100644
--- a/promotion/views.py
+++ b/promotion/views.py
@@ -38,7 +38,6 @@ class ContractView(FormView):
     success_url = reverse_lazy('promotion:thanks')
 
     def get_context_data(self, **kwargs):
-        # import pdb; pdb.set_trace()
         self.context = super().get_context_data(**kwargs)
         code = self.request.GET.get("code")
         self.get_discount(code)
@@ -50,29 +49,34 @@ class ContractView(FormView):
             "total": 25.0
         })
         if self.promotion:
-            self.context['sim'] = self.context.get_discount(self.context["sim"])
-            self.context['mensual'] = self.context.get_discount(self.context["mensual"])
-            self.context['total'] = self.context.get_discount(self.context["total"])
+            self.context['sim'] = self.promotion.get_discount(self.context["sim"])
+            self.context['mensual'] = self.promotion.get_discount(self.context["mensual"])
+            self.context['total'] = self.promotion.get_discount(self.context["total"])
+
+        if self.vp_token:
+            self.context['verificable_presentation'] = self.vp_token
+
         return self.context
         
         
     def get_form_kwargs(self):
         kwargs = super().get_form_kwargs()
+        code = self.request.GET.get("code")
+        self.get_discount(code)
         if not self.vp_token:
             return kwargs
 
         self.vp_token.get_user_info()
-        kwargs['verificable_presentation'] = self.vp_token
-        kwargs["nif"] = self.vp_token.user_info.get("nif", '')
-        kwargs["name"] = self.vp_token.user_info.get("name", '')
-        kwargs["first_last_name"] = self.vp_token.user_info.get("first_last_name", '')
-        kwargs["second_last_name"] = self.vp_token.user_info.get("second_last_name", '')
-        kwargs["email"] = self.vp_token.user_info.get("email", '')
-        kwargs["email_repeat"] = self.vp_token.user_info.get("email", '')
-        kwargs["telephone"] = self.vp_token.user_info.get("telephone", '')
-        kwargs["birthday"] = self.vp_token.user_info.get("birthday", '')
-        kwargs["gen"] = self.vp_token.user_info.get("gen", '')
-        kwargs["lang"] = self.vp_token.user_info.get("lang", '')
+        kwargs['initial']["nif"] = self.vp_token.user_info.get("nif", '')
+        kwargs['initial']["name"] = self.vp_token.user_info.get("name", '')
+        kwargs['initial']["first_last_name"] = self.vp_token.user_info.get("first_last_name", '')
+        kwargs['initial']["second_last_name"] = self.vp_token.user_info.get("second_last_name", '')
+        kwargs['initial']["email"] = self.vp_token.user_info.get("email", '')
+        kwargs['initial']["email_repeat"] = self.vp_token.user_info.get("email", '')
+        kwargs['initial']["telephone"] = self.vp_token.user_info.get("telephone", '')
+        kwargs['initial']["birthday"] = self.vp_token.user_info.get("birthday", '')
+        kwargs['initial']["gen"] = self.vp_token.user_info.get("gen", '')
+        kwargs['initial']["lang"] = self.vp_token.user_info.get("lang", '')
         return kwargs
 
     def form_valid(self, form):
@@ -81,16 +85,18 @@ class ContractView(FormView):
     def get_discount(self, code):
         if not code:
             return
+        if self.authorization:
+            return
 
         self.authorization = Authorization.objects.filter(
             code=code,
-            code_unused=False
+            code_used=False
         ).first()
         if self.authorization:
-            if self.authorization.promotions:
-                self.promotion = self.authorization.promotionsp[-1]
-            if self.authorization.vp_tokens:
-                self.vp_tokens = self.authorization.vp_tokens[-1]
+            if self.authorization.promotions.exists():
+                self.promotion = self.authorization.promotions.all()[0]
+            if self.authorization.vp_tokens.exists():
+                self.vp_token = self.authorization.vp_tokens.all()[0]
         
 
 class SelectWalletView(FormView):