diff --git a/core/dto.md b/core/dto.md
index 757a8f45ff9..97ddf292188 100644
--- a/core/dto.md
+++ b/core/dto.md
@@ -22,6 +22,8 @@ final class UserResetPasswordDto
 }
 ```
 
+**Note**: if you have any *denormalizationContext* groups on the *User* entity (or just on the entity *Post* operation), make sure to annotate the fields in the DTO class accordingly.
+
 ```php
 <?php
 // api/src/Model/User.php
@@ -88,6 +90,8 @@ This will dispatch the `App\Dto\Message` via [Symfony Messenger](https://symfony
 
 To return another representation of your data in a [State Provider](./state-providers.md) we advise to specify the `output` attribute of the resource. Note that this technique works without any changes to the resource but your API documentation would be wrong.
 
+**Note**: if you have any *normalizationContext* groups on the *User* entity (or just on the entity *Get* operation), make sure to annotate the fields in the DTO class accordingly.
+
 ```php
 <?php