diff --git a/lib/Digitick/Sepa/DomBuilder/BaseDomBuilder.php b/lib/Digitick/Sepa/DomBuilder/BaseDomBuilder.php
index 02af781..b8c1cad 100644
--- a/lib/Digitick/Sepa/DomBuilder/BaseDomBuilder.php
+++ b/lib/Digitick/Sepa/DomBuilder/BaseDomBuilder.php
@@ -109,7 +109,7 @@ public function visitGroupHeader(GroupHeader $groupHeader)
         $groupHeaderTag->appendChild($messageId);
         $creationDateTime = $this->createElement(
             'CreDtTm',
-            $groupHeader->getCreationDateTime()->format('Y-m-d\TH:i:s\Z')
+            $groupHeader->getCreationDateTime()->format($groupHeader->getCreationDateTimeFormat())
         );
         $groupHeaderTag->appendChild($creationDateTime);
         $groupHeaderTag->appendChild($this->createElement('NbOfTxs', $groupHeader->getNumberOfTransactions()));
diff --git a/lib/Digitick/Sepa/GroupHeader.php b/lib/Digitick/Sepa/GroupHeader.php
index c674567..0984465 100644
--- a/lib/Digitick/Sepa/GroupHeader.php
+++ b/lib/Digitick/Sepa/GroupHeader.php
@@ -66,6 +66,11 @@ class GroupHeader
      */
     protected $creationDateTime;
 
+    /**
+     * @var string
+     */
+    protected $creationDateTimeFormat = 'Y-m-d\TH:i:s\Z';
+
     /**
      * Should the bank book multiple transaction as a batch
      *
@@ -211,4 +216,19 @@ public function getCreationDateTime()
         return $this->creationDateTime;
     }
 
-}
\ No newline at end of file
+    /**
+     * @param string $creationDateTimeFormat
+     */
+    public function setCreationDateTimeFormat($creationDateTimeFormat)
+    {
+        $this->creationDateTimeFormat = $creationDateTimeFormat;
+    }
+
+    /**
+     * @return string
+     */
+    public function getCreationDateTimeFormat()
+    {
+        return $this->creationDateTimeFormat;
+    }
+}
diff --git a/tests/CustomerCreditValidationTest.php b/tests/CustomerCreditValidationTest.php
index c2f3965..31345e9 100644
--- a/tests/CustomerCreditValidationTest.php
+++ b/tests/CustomerCreditValidationTest.php
@@ -305,4 +305,46 @@ public function testUmlautConversion()
         $testNode = $xpathDoc->query('//sepa:Ustrd');
         $this->assertEquals('Only A-Z without aeoeuessAeOeUe remittanceInformation', $testNode->item(0)->textContent);
     }
+
+    /**
+     * Test a transfer file using other date format.
+     * There are different representations possible for IsoDateTime:
+     * http://www.swift.com/assets/corporates/documents/business_areas/ebam_standards_mx/business/x68910b9357eed3cf49770d42b07d70f1.htm
+     */
+    public function testSinglePaymentOtherCreationDateTimeFormat()
+    {
+        $dateTimeFormat = 'Y-m-d\TH:i:s.000P';
+
+        $groupHeader = new GroupHeader('transferID', 'Me');
+        $groupHeader->setCreationDateTimeFormat($dateTimeFormat);
+        $sepaFile = new CustomerCreditTransferFile($groupHeader);
+
+        $transfer = new CustomerCreditTransferInformation('0.02', 'FI1350001540000056', 'Their Corp');
+        $transfer->setBic('OKOYFIHH');
+        $transfer->setRemittanceInformation('Transaction Description');
+        $transfer->setEndToEndIdentification(uniqid());
+        $transfer->setInstructionId(uniqid());
+
+        $payment = new PaymentInformation('Payment Info ID', 'FR1420041010050500013M02606', 'PSSTFRPPMON', 'My Corp');
+        $payment->setValidPaymentMethods(array('TRANSFER'));
+        $payment->setPaymentMethod('TRANSFER');
+        $payment->setCategoryPurposeCode('SALA');
+        $payment->addTransfer($transfer);
+
+        $sepaFile->addPaymentInformation($payment);
+
+        $domBuilder = new CustomerCreditTransferDomBuilder();
+        $sepaFile->accept($domBuilder);
+        $xml = $domBuilder->asXml();
+
+        $doc = new \DOMDocument();
+        $doc->loadXML($xml);
+
+        $xpathDoc = new \DOMXPath($doc);
+        $xpathDoc->registerNamespace('sepa', 'urn:iso:std:iso:20022:tech:xsd:pain.001.002.03');
+
+        $dateTime = new \DateTime();
+        $testNode = $xpathDoc->query('//sepa:CreDtTm');
+        $this->assertEquals($dateTime->format($dateTimeFormat), $testNode->item(0)->textContent, 'CreDtTm has specified format.');
+    }
 }