diff --git a/src/Data/NominalAccounts/Identification/UnidentifiedTransactionData.php b/src/Data/NominalAccounts/Identification/UnidentifiedTransactionData.php
index aa556d5..1bbfaca 100644
--- a/src/Data/NominalAccounts/Identification/UnidentifiedTransactionData.php
+++ b/src/Data/NominalAccounts/Identification/UnidentifiedTransactionData.php
@@ -29,6 +29,7 @@ class UnidentifiedTransactionData extends Data
         public ?string $documentNumber = null,
         public ?string $date = null,
         public ?string $purpose = null,
+        public ?string $accountNumber = null,
         public ?PayerData $payer = null, // Nested DTO for payer details
     ) {}
     // </SECTION>
diff --git a/src/Traits/SignableData.php b/src/Traits/SignableData.php
index 0b698f1..8aaafd3 100644
--- a/src/Traits/SignableData.php
+++ b/src/Traits/SignableData.php
@@ -20,7 +20,7 @@ trait SignableData
 
         // 3. Canonicalize (RFC 8785 - simple version: sort keys, remove nulls, no spaces)
         $canonicalData = $this->canonicalizeArray($data);
-        
+
         $jsonToSign = json_encode($canonicalData, JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
 
         // 4. Sign
@@ -32,7 +32,7 @@ trait SignableData
         }
 
         $current = array_values($this->digestSignatures->toCollection()->all());
-        $current[] = new DigestSignatureData($signature, 'rsa');
+        $current[] = new DigestSignatureData($signature, 'RSA');
 
         $this->digestSignatures = new DataCollection(DigestSignatureData::class, $current);
 
@@ -42,7 +42,7 @@ trait SignableData
     private function canonicalizeArray(array $array): array
     {
         // Remove nulls and empty strings
-        $array = array_filter($array, fn($v) => $v !== null);
+        $array = array_filter($array, fn ($v) => $v !== null);
 
         // Sort keys lexically
         ksort($array);