diff --git a/components/serializer.rst b/components/serializer.rst
index aecf25fea4f..1b165134f52 100644
--- a/components/serializer.rst
+++ b/components/serializer.rst
@@ -1242,6 +1242,33 @@ to ``true``::
$result = $normalizer->normalize($dummy, 'json', [AbstractObjectNormalizer::SKIP_NULL_VALUES => true]);
// ['bar' => 'notNull']
+Require all Properties
+----------------------
+
+By default, the Serializer will add ``null`` to nullable properties when the parameters for those are not provided.
+You can change this behavior by setting the ``AbstractNormalizer::REQUIRE_ALL_PROPERTIES`` context option
+to ``true``::
+
+ class Dummy
+ {
+ public function __construct(
+ public string $foo,
+ public ?string $bar,
+ ) {
+ }
+ }
+
+ $data = ['foo' => 'notNull'];
+
+ $normalizer = new ObjectNormalizer();
+ $result = $normalizer->denormalize($data, Dummy::class, 'json', [AbstractNormalizer::REQUIRE_ALL_PROPERTIES => true]);
+ // throws Symfony\Component\Serializer\Exception\MissingConstructorArgumentException
+
+.. versionadded:: 6.3
+
+ The ``AbstractNormalizer::PREVENT_NULLABLE_FALLBACK`` context option
+ was introduced in Symfony 6.3.
+
Skipping Uninitialized Properties
---------------------------------
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