$VAR1 = {
          'DATE' => '2013-04-25',
          'TW' => '1',
          'REF' => '1234567',
          'ACC' => '33456790'
        };
$VAR2 = {
          'DOC' => 'EMAIL'
        };

##</code><code>##

push @$data, {DOC => 'EMAIL'};

##</code><code>##

$VAR1 = {
          'DATE' => '2013-04-25',
          'TW' => '1',
          'REF' => '1234567',
          'ACC' => '33456790'
          'DOC' => 'EMAIL'
        };