diff --git a/VERSION.md b/VERSION.md
index ff3a77f..d4a4663 100644
--- a/VERSION.md
+++ b/VERSION.md
@@ -1,3 +1,9 @@
+4.6.0
+
+## Added
+- Add draft support methods for retentions: `updateDraft()`, `copyToDraft()`, and `stampDraft()`.
+- Allow `Retentions::cancel()` to be called without query parameters for deleting draft retentions.
+
 4.5.0
 
 ## Added
diff --git a/retention.pdf b/retention.pdf
new file mode 100644
index 0000000..17bd6da
Binary files /dev/null and b/retention.pdf differ
diff --git a/src/Resources/Retentions.php b/src/Resources/Retentions.php
index 63f7d47..10f9a18 100644
--- a/src/Resources/Retentions.php
+++ b/src/Resources/Retentions.php
@@ -66,12 +66,12 @@ public function create($params): mixed
 	 * Cancels a Retention
 	 *
 	 * @param string $id Retention ID.
-	 * @param array $query URL query parameters.
+	 * @param array|null $query URL query parameters.
 	 * @return mixed JSON-decoded response.
 	 *
 	 * @throws FacturapiException
 	 */
-	public function cancel($id, $query): mixed
+	public function cancel($id, $query = null): mixed
 	{
 		try {
 			return json_decode($this->executeDeleteRequest($this->getRequestUrl($id, $query), null));
@@ -80,6 +80,85 @@ public function cancel($id, $query): mixed
 		}
 	}
 
+	/**
+	 * Updates a Retention with "draft" status
+	 *
+	 * @param string $id Retention ID.
+	 * @param array $body Draft payload.
+	 * @return mixed JSON-decoded response.
+	 *
+	 * @throws FacturapiException
+	 */
+	public function updateDraft($id, $body): mixed
+	{
+		try {
+			return json_decode($this->executeJsonPutRequest($this->getRequestUrl($id), $body));
+		} catch (FacturapiException $e) {
+			throw $e;
+		}
+	}
+
+	/**
+	 * @deprecated Use updateDraft() instead. Will be removed in v5.
+	 */
+	public function update_draft($id, $body): mixed
+	{
+		trigger_error('Retentions::update_draft() is deprecated and will be removed in v5. Use updateDraft() instead.', E_USER_DEPRECATED);
+		return $this->updateDraft($id, $body);
+	}
+
+	/**
+	 * Creates a new draft Retention copying the information from the specified Retention
+	 *
+	 * @param string $id Retention ID.
+	 * @return mixed JSON-decoded response.
+	 *
+	 * @throws FacturapiException
+	 */
+	public function copyToDraft($id): mixed
+	{
+		try {
+			return json_decode($this->executeJsonPostRequest($this->getRequestUrl($id . "/copy"), null));
+		} catch (FacturapiException $e) {
+			throw $e;
+		}
+	}
+
+	/**
+	 * @deprecated Use copyToDraft() instead. Will be removed in v5.
+	 */
+	public function copy_to_draft($id): mixed
+	{
+		trigger_error('Retentions::copy_to_draft() is deprecated and will be removed in v5. Use copyToDraft() instead.', E_USER_DEPRECATED);
+		return $this->copyToDraft($id);
+	}
+
+	/**
+	 * Stamps a draft Retention
+	 *
+	 * @param string $id Retention ID.
+	 * @return mixed JSON-decoded response.
+	 *
+	 * @throws FacturapiException
+	 */
+	public function stampDraft($id): mixed
+	{
+		try {
+			return json_decode($this->executeJsonPostRequest($this->getRequestUrl($id . "/stamp"), null));
+		} catch (FacturapiException $e) {
+			throw $e;
+		}
+	}
+
+	/**
+	 * @deprecated Use stampDraft() instead. Will be removed in v5.
+	 */
+	public function stamp_draft($id): mixed
+	{
+		trigger_error('Retentions::stamp_draft() is deprecated and will be removed in v5. Use stampDraft() instead.', E_USER_DEPRECATED);
+		return $this->stampDraft($id);
+	}
+
 	/**
 	 * Sends the retention to the customer's email
 	 *
diff --git a/tests/Resources/RetentionsTest.php b/tests/Resources/RetentionsTest.php
new file mode 100644
index 0000000..ae1d6bf
--- /dev/null
+++ b/tests/Resources/RetentionsTest.php
@@ -0,0 +1,102 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Facturapi\Tests\Resources;
+
+use Facturapi\Resources\Retentions;
+use Facturapi\Tests\Support\FakeHttpClient;
+use GuzzleHttp\Psr7\Response;
+use PHPUnit\Framework\TestCase;
+
+final class RetentionsTest extends TestCase
+{
+    public function testCreateCanSendDraftRetentionPayload(): void
+    {
+        $httpClient = new FakeHttpClient(new Response(200, [], '{"id":"ret_draft","status":"draft"}'));
+        $retentions = new Retentions('sk_test_abc123', ['httpClient' => $httpClient]);
+
+        $retentions->create([
+            'status' => 'draft',
+            'customer' => null,
+        ]);
+
+        $request = $httpClient->requests()[0];
+        self::assertSame('POST', $request->getMethod());
+        self::assertSame('https://www.facturapi.io/v2/retentions', (string) $request->getUri());
+        self::assertJsonStringEqualsJsonString(
+            '{"status":"draft","customer":null}',
+            (string) $request->getBody()
+        );
+    }
+
+    public function testUpdateDraftUsesPutOnRetentionId(): void
+    {
+        $httpClient = new FakeHttpClient(new Response(200, [], '{"id":"ret_123"}'));
+        $retentions = new Retentions('sk_test_abc123', ['httpClient' => $httpClient]);
+
+        $retentions->updateDraft('ret_123', [
+            'folio_int' => 'R-2026-001',
+        ]);
+
+        $request = $httpClient->requests()[0];
+        self::assertSame('PUT', $request->getMethod());
+        self::assertSame('https://www.facturapi.io/v2/retentions/ret_123', (string) $request->getUri());
+        self::assertJsonStringEqualsJsonString(
+            '{"folio_int":"R-2026-001"}',
+            (string) $request->getBody()
+        );
+    }
+
+    public function testCopyToDraftUsesCopyEndpoint(): void
+    {
+        $httpClient = new FakeHttpClient(new Response(200, [], '{"id":"ret_draft"}'));
+        $retentions = new Retentions('sk_test_abc123', ['httpClient' => $httpClient]);
+
+        $retentions->copyToDraft('ret_123');
+
+        $request = $httpClient->requests()[0];
+        self::assertSame('POST', $request->getMethod());
+        self::assertSame('https://www.facturapi.io/v2/retentions/ret_123/copy', (string) $request->getUri());
+        self::assertSame('', (string) $request->getBody());
+    }
+
+    public function testStampDraftUsesStampEndpoint(): void
+    {
+        $httpClient = new FakeHttpClient(new Response(200, [], '{"id":"ret_123","status":"valid"}'));
+        $retentions = new Retentions('sk_test_abc123', ['httpClient' => $httpClient]);
+
+        $retentions->stampDraft('ret_123');
+
+        $request = $httpClient->requests()[0];
+        self::assertSame('POST', $request->getMethod());
+        self::assertSame('https://www.facturapi.io/v2/retentions/ret_123/stamp', (string) $request->getUri());
+        self::assertSame('', (string) $request->getBody());
+    }
+
+    public function testCancelCanDeleteDraftWithoutQueryParameters(): void
+    {
+        $httpClient = new FakeHttpClient(new Response(200, [], '{"id":"ret_123","deleted":true}'));
+        $retentions = new Retentions('sk_test_abc123', ['httpClient' => $httpClient]);
+
+        $retentions->cancel('ret_123');
+
+        $request = $httpClient->requests()[0];
+        self::assertSame('DELETE', $request->getMethod());
+        self::assertSame('https://www.facturapi.io/v2/retentions/ret_123', (string) $request->getUri());
+    }
+
+    public function testAllCanFilterByDraftStatus(): void
+    {
+        $httpClient = new FakeHttpClient(new Response(200, [], '{"data":[]}'));
+        $retentions = new Retentions('sk_test_abc123', ['httpClient' => $httpClient]);
+
+        $retentions->all([
+            'status' => 'draft',
+        ]);
+
+        $request = $httpClient->requests()[0];
+        self::assertSame('GET', $request->getMethod());
+        self::assertSame('https://www.facturapi.io/v2/retentions?status=draft', (string) $request->getUri());
+    }
+}