diff --git a/README.md b/README.md
index 0211188..bc44e7f 100644
--- a/README.md
+++ b/README.md
@@ -230,6 +230,8 @@ You may provide the following as envelopes:
 
 <a name="changelog"></a>
 ## Changelog
+* `1.5.3`
+  * Added optional `deepfake` and `deepfake_confidence` fields for document event
 * `1.5.2`
   * Fixed validation of `second_user_merchant_id` field for the "Transfer" event
 * `1.5.1`
diff --git a/src/Envelopes/Builder.php b/src/Envelopes/Builder.php
index 044091f..1636ef4 100644
--- a/src/Envelopes/Builder.php
+++ b/src/Envelopes/Builder.php
@@ -2050,6 +2050,8 @@ public static function postBackEvent(
      * @param string|null $translatedExtractedText
      * @param string|null $translatedFrom
      * @param string|null $translatedTo
+     * @param string|null $deepfake
+     * @param string|null $deepfakeConfidence
      *
      * @return Builder
      */
@@ -2105,7 +2107,9 @@ public static function documentEvent(
         $textLanguageDetails = null,
         $translatedExtractedText = null,
         $translatedFrom = null,
-        $translatedTo = null
+        $translatedTo = null,
+        $deepfake = null,
+        $deepfakeConfidence = null
     ) {
         $sequenceId = $sequenceId ?? '';
         $builder = new self(self::EVENT_DOCUMENT, $sequenceId);
@@ -2152,7 +2156,9 @@ public static function documentEvent(
                 $textLanguageDetails,
                 $translatedExtractedText,
                 $translatedFrom,
-                $translatedTo
+                $translatedTo,
+                $deepfake,
+                $deepfakeConfidence
             )
             ->addUserData(
                 $email,
@@ -5148,6 +5154,8 @@ public function addKycSubmitData(
      * @param string|null $translatedExtractedText
      * @param string|null $translatedFrom
      * @param string|null $translatedTo
+     * @param string|null $deepfake
+     * @param string|null $deepfakeConfidence
      * @return Builder
      */
     public function addDocumentEventData(
@@ -5189,7 +5197,9 @@ public function addDocumentEventData(
         $textLanguageDetails = null,
         $translatedExtractedText = null,
         $translatedFrom = null,
-        $translatedTo = null
+        $translatedTo = null,
+        $deepfake = null,
+        $deepfakeConfidence = null
     ) {
         if (!is_string($eventId)) {
             throw new \InvalidArgumentException('Event ID must be string');
@@ -5248,7 +5258,7 @@ public function addDocumentEventData(
         }
         if ($amount !== null) {
             if (!is_float($amount)) {
-                throw new \InvalidArgumentException('Amount must be must be float');
+                throw new \InvalidArgumentException('Amount must be float');
             }
             if ($amount < 0) {
                 throw new \InvalidArgumentException('Amount cannot be negative');
@@ -5333,6 +5343,20 @@ public function addDocumentEventData(
         if ($translatedTo !== null && !is_string($translatedTo)) {
             throw new \InvalidArgumentException('Translated To must be string');
         }
+        if ($deepfake !== null && !is_bool($deepfake)) {
+            throw new \InvalidArgumentException('Deepfake enabled flag must be boolean');
+        }
+        if ($deepfakeConfidence !== null) {
+            if (!is_int($deepfakeConfidence) && !is_float($deepfakeConfidence)) {
+                throw new \InvalidArgumentException('Deepfake confidence must be number');
+            }
+            if ($deepfakeConfidence < 0) {
+                throw new \InvalidArgumentException('Deepfake confidence cannot be negative');
+            }
+            if ($deepfakeConfidence > 1) {
+                throw new \InvalidArgumentException('Deepfake confidence cannot be greater than 1');
+            }
+        }
 
         $this->replace('event_id', $eventId);
         $this->replace('event_timestamp', $eventTimestamp);
@@ -5373,6 +5397,8 @@ public function addDocumentEventData(
         $this->replace('translated_extracted_text', $translatedExtractedText);
         $this->replace('translated_from', $translatedFrom);
         $this->replace('translated_to', $translatedTo);
+        $this->replace('deepfake', $deepfake);
+        $this->replaceZeroAllowed('deepfake_confidence', $deepfakeConfidence);
 
         return $this;
     }
diff --git a/src/Envelopes/ValidatorV1.php b/src/Envelopes/ValidatorV1.php
index cf4bb77..6c12c5b 100644
--- a/src/Envelopes/ValidatorV1.php
+++ b/src/Envelopes/ValidatorV1.php
@@ -271,7 +271,9 @@ class ValidatorV1
         'text_language_details' => 'array_string',
         'translated_extracted_text' => 'string(225)',
         'translated_from' => 'string(225)',
-        'translated_to' => 'string(225)'
+        'translated_to' => 'string(225)',
+        'deepfake' => 'bool',
+        'deepfake_confidence' => 'float'
     );
 
     private static $fieldWithZeroAllowed = array(
@@ -997,6 +999,8 @@ class ValidatorV1
                 "translated_extracted_text",
                 "translated_from",
                 "translated_to",
+                "deepfake",
+                "deepfake_confidence",
             )
         ),
     );
diff --git a/tests/Covery/BuildDocumentEventTest.php b/tests/Covery/BuildDocumentEventTest.php
index 8968732..86a08a5 100644
--- a/tests/Covery/BuildDocumentEventTest.php
+++ b/tests/Covery/BuildDocumentEventTest.php
@@ -63,10 +63,12 @@ public function testBuild()
             ['en'],
             'testTranslatedExtractedText',
             'testTranslatedFrom',
-            'testTranslatedTo'
+            'testTranslatedTo',
+            false,
+            0.12
         )->build();
 
-        self::assertCount(51, $result);
+        self::assertCount(53, $result);
         self::assertSame(Builder::EVENT_DOCUMENT, $result->getType());
         self::assertSame('tempSequenceId', $result->getSequenceId());
         self::assertSame('tempEventId', $result['event_id']);
@@ -119,7 +121,8 @@ public function testBuild()
         self::assertSame(['en'], $result['text_language_details']);
         self::assertSame("testTranslatedExtractedText", $result['translated_extracted_text']);
         self::assertSame("testTranslatedFrom", $result['translated_from']);
-        self::assertSame("testTranslatedTo", $result['translated_to']);
+        self::assertSame(false, $result['deepfake']);
+        self::assertSame(0.12, $result['deepfake_confidence']);
 
         $validator->validate($result);
 
@@ -258,4 +261,128 @@ public function testEventExpectInvalidArgumentExceptionForNegativeAmountConverte
             -34.5
         )->build();
     }
+
+    public function testEventExpectInvalidArgumentExceptionForNegativeDeepfakeConfidence()
+    {
+        $this->expectException(\InvalidArgumentException::class);
+        $this->expectExceptionMessage("Deepfake confidence cannot be negative");
+        Builder::documentEvent(
+            'tempEventId',
+            123456,
+            'tempUserId',
+            \Covery\Client\DocumentType::INTERNATIONAL_PASSPORT,
+            'tempSequenceId',
+            'tempGroupId',
+            'tempDocumentCountry',
+            'tempDocumentNumber',
+            'tempFileName',
+            'tempEmail',
+            'tempFirstName',
+            'tempLastName',
+            'tempFullname',
+            123456,
+            18,
+            'tempGender',
+            'tempNationality',
+            'tempCountry',
+            'tempCity',
+            'tempZip',
+            'tempAddress',
+            123456,
+            123456,
+            'tempAuthority',
+            'testRecordNumber',
+            'testPersonalNumber',
+            'testDescription',
+            10.4,
+            'testPaymentMethod',
+            23.6,
+            34.5,
+            'testCurrency',
+            'testMrzDocumentType',
+            'testMrzCountry',
+            'testMrzLastname',
+            'testMrzFirstname',
+            'testMrzFullname',
+            'testMrzDocumentNumber',
+            'testMrzNationality',
+            'testMrzPersonalNumber',
+            123456,
+            'testMrzGender',
+            123456,
+            'testMrzRecordNumber',
+            false,
+            'tempMrzAuthority',
+            123456,
+            'testExtractedText',
+            ['en'],
+            'testTranslatedExtractedText',
+            'testTranslatedFrom',
+            'testTranslatedTo',
+            false,
+            -0.12
+        )->build();
+    }
+
+    public function testEventExpectInvalidArgumentExceptionForGreaterThanOneDeepfakeConfidence()
+    {
+        $this->expectException(\InvalidArgumentException::class);
+        $this->expectExceptionMessage("Deepfake confidence cannot be greater than 1");
+        Builder::documentEvent(
+            'tempEventId',
+            123456,
+            'tempUserId',
+            \Covery\Client\DocumentType::INTERNATIONAL_PASSPORT,
+            'tempSequenceId',
+            'tempGroupId',
+            'tempDocumentCountry',
+            'tempDocumentNumber',
+            'tempFileName',
+            'tempEmail',
+            'tempFirstName',
+            'tempLastName',
+            'tempFullname',
+            123456,
+            18,
+            'tempGender',
+            'tempNationality',
+            'tempCountry',
+            'tempCity',
+            'tempZip',
+            'tempAddress',
+            123456,
+            123456,
+            'tempAuthority',
+            'testRecordNumber',
+            'testPersonalNumber',
+            'testDescription',
+            10.4,
+            'testPaymentMethod',
+            23.6,
+            34.5,
+            'testCurrency',
+            'testMrzDocumentType',
+            'testMrzCountry',
+            'testMrzLastname',
+            'testMrzFirstname',
+            'testMrzFullname',
+            'testMrzDocumentNumber',
+            'testMrzNationality',
+            'testMrzPersonalNumber',
+            123456,
+            'testMrzGender',
+            123456,
+            'testMrzRecordNumber',
+            false,
+            'tempMrzAuthority',
+            123456,
+            'testExtractedText',
+            ['en'],
+            'testTranslatedExtractedText',
+            'testTranslatedFrom',
+            'testTranslatedTo',
+            false,
+            1.12
+        )->build();
+    }
 }