diff --git a/lib/Models/DocumentFromTemplateResponseFieldsInnerInner.php b/lib/Models/DocumentFromTemplateResponseFieldsInnerInner.php
index 25cb8f3..57ac147 100644
--- a/lib/Models/DocumentFromTemplateResponseFieldsInnerInner.php
+++ b/lib/Models/DocumentFromTemplateResponseFieldsInnerInner.php
@@ -403,7 +403,6 @@ public function __construct($data = null)
         $this->setIfExists('options', $data ?? [], null);
         $this->setIfExists('default_option', $data ?? [], null);
         $this->setIfExists('allow_other', $data ?? [], null);
-        $this->normalizeCheckboxValue();
     }
 
     public function hasActualInstance(): bool
@@ -1177,39 +1176,6 @@ public function setAllowOther($allow_other)
     }
     private function normalizeAfterSet(): void
     {
-        $this->normalizeCheckboxValue();
-    }
-
-    private function normalizeCheckboxValue(): void
-    {
-        if (($this->container['type'] ?? null) !== 'checkbox' || !array_key_exists('value', $this->container) || $this->container['value'] === null) {
-            return;
-        }
-
-        $this->container['value'] = self::normalizeCheckboxScalar($this->container['value']);
-    }
-
-    private static function normalizeCheckboxScalar($value): string
-    {
-        if (is_object($value) && method_exists($value, 'hasActualInstance') && $value->hasActualInstance()) {
-            $value = $value->getActualInstance();
-        }
-
-        if (is_bool($value)) {
-            return $value ? 't' : 'f';
-        }
-
-        if (is_string($value)) {
-            $normalized = strtolower(trim($value));
-            if ($normalized === 'true' || $normalized === 't') {
-                return 't';
-            }
-            if ($normalized === 'false' || $normalized === 'f') {
-                return 'f';
-            }
-        }
-
-        throw new \InvalidArgumentException('Checkbox field values must be boolean or one of "true", "false", "t", or "f".');
     }
 
     /**
diff --git a/lib/Models/DocumentResponseFieldsInnerInner.php b/lib/Models/DocumentResponseFieldsInnerInner.php
index 61969e2..bdbc714 100644
--- a/lib/Models/DocumentResponseFieldsInnerInner.php
+++ b/lib/Models/DocumentResponseFieldsInnerInner.php
@@ -403,7 +403,6 @@ public function __construct($data = null)
         $this->setIfExists('options', $data ?? [], null);
         $this->setIfExists('default_option', $data ?? [], null);
         $this->setIfExists('allow_other', $data ?? [], null);
-        $this->normalizeCheckboxValue();
     }
 
     public function hasActualInstance(): bool
@@ -1177,39 +1176,6 @@ public function setAllowOther($allow_other)
     }
     private function normalizeAfterSet(): void
     {
-        $this->normalizeCheckboxValue();
-    }
-
-    private function normalizeCheckboxValue(): void
-    {
-        if (($this->container['type'] ?? null) !== 'checkbox' || !array_key_exists('value', $this->container) || $this->container['value'] === null) {
-            return;
-        }
-
-        $this->container['value'] = self::normalizeCheckboxScalar($this->container['value']);
-    }
-
-    private static function normalizeCheckboxScalar($value): string
-    {
-        if (is_object($value) && method_exists($value, 'hasActualInstance') && $value->hasActualInstance()) {
-            $value = $value->getActualInstance();
-        }
-
-        if (is_bool($value)) {
-            return $value ? 't' : 'f';
-        }
-
-        if (is_string($value)) {
-            $normalized = strtolower(trim($value));
-            if ($normalized === 'true' || $normalized === 't') {
-                return 't';
-            }
-            if ($normalized === 'false' || $normalized === 'f') {
-                return 'f';
-            }
-        }
-
-        throw new \InvalidArgumentException('Checkbox field values must be boolean or one of "true", "false", "t", or "f".');
     }
 
     /**
diff --git a/test/Regression/EmbeddedTest.php b/test/Regression/EmbeddedTest.php
index 6eb1d1d..17237f1 100644
--- a/test/Regression/EmbeddedTest.php
+++ b/test/Regression/EmbeddedTest.php
@@ -8,6 +8,7 @@
 use SignWell\Sdk\Embedded;
 use SignWell\Sdk\Models\DocumentRequest;
 use SignWell\Sdk\Models\DocumentResponse;
+use SignWell\Sdk\Models\DocumentResponseFieldsInnerInner;
 use SignWell\Sdk\Models\FieldsInnerInner;
 use SignWell\Sdk\Models\FieldType;
 use SignWell\Sdk\ObjectSerializer;
@@ -169,6 +170,34 @@ public function testCheckboxFieldValuesNormalizeToApiWireValues(): void
         }
     }
 
+    public function testCheckboxResponseValuesDeserializeFromApiWireValues(): void
+    {
+        $checkbox = [
+            'type' => 'checkbox',
+            'value' => 't',
+            'x' => 1,
+            'y' => 1,
+            'page' => 1,
+            'recipient_id' => '1',
+        ];
+
+        $field = ObjectSerializer::deserialize(
+            json_decode(json_encode($checkbox, JSON_THROW_ON_ERROR), false, flags: JSON_THROW_ON_ERROR),
+            DocumentResponseFieldsInnerInner::class
+        );
+        $document = ObjectSerializer::deserialize(
+            json_decode(json_encode([
+                'id' => 'doc_123',
+                'test_mode' => true,
+                'fields' => [[$checkbox]],
+            ], JSON_THROW_ON_ERROR), false, flags: JSON_THROW_ON_ERROR),
+            DocumentResponse::class
+        );
+
+        self::assertInstanceOf(DocumentResponseFieldsInnerInner::class, $field);
+        self::assertInstanceOf(DocumentResponse::class, $document);
+    }
+
     public function testRejectsMalformedPdfBase64Uploads(): void
     {
         $this->expectException(\InvalidArgumentException::class);