Not processing. Duplicate IPN

After the paypal payment, below error occurred.

Page Expired: Duplicate Return-Data.
Please contact Support if you need any assistance.

Ipn Log :


PHP v5.3.3 :: WordPress® v3.3.2 :: s2Member® v111105 :: s2Member® Pro v111105
Memory 11.23 MB :: Real Memory 13.50 MB :: Peak Memory 12.84 MB :: Real Peak Memory 13.50 MB
premium.123freevectors.com/?s2member_paypal_notify=1
User-Agent: 
array (
  'mc_gross' => '20.00',
  'invoice' => '4fb3611716e87~122.178.147.72',
  'protection_eligibility' => 'Ineligible',
  'payer_id' => 'NGXQ8K2QFMLLW',
  'tax' => '0.00',
  'payment_date' => '01:13:27 May 16, 2012 PDT',
  'payment_status' => 'Completed',
  'charset' => 'windows-1252',
  'first_name' => 'pushparaj',
  'option_selection1' => 'premium.123freevectors.com',
  'option_selection2' => '122.178.147.72',
  'mc_fee' => '0.88',
  'notify_version' => '3.4',
  'custom' => 'premium.123freevectors.com',
  'payer_status' => 'verified',
  'business' => 'buyer_1337153268_biz@stockgraphicdesigns.com',
  'quantity' => '1',
  'verify_sign' => 'AISSozGrDPE5-QZ9Ew8tJpNzI6boAim-1cKNQNtOuZTcks7o2uvZ.jxs',
  'payer_email' => 'testac_1337155309_per@stockgraphicdesigns.com',
  'option_name1' => 'Originating Domain',
  'option_name2' => 'Customer IP Address',
  'txn_id' => '69748567HX985362C',
  'payment_type' => 'instant',
  'last_name' => 'Pemble',
  'receiver_email' => 'buyer_1337153268_biz@stockgraphicdesigns.com',
  'payment_fee' => '0.88',
  'receiver_id' => 'XEU64NRKYGH6C',
  'txn_type' => 'web_accept',
  'item_name' => '25 Downloads / 6 Month / description and pricing details here.',
  'mc_currency' => 'USD',
  'item_number' => '4::2 Y',
  'residence_country' => 'US',
  'test_ipn' => '1',
  'handling_amount' => '0.00',
  'transaction_subject' => 'premium.123freevectors.com',
  'payment_gross' => '20.00',
  'shipping' => '0.00',
  'ipn_track_id' => '3a02fce0901ae',
  's2member_log' => 
  array (
    0 => 'IPN received on: Wed May 16, 2012 8:13:38 am UTC',
    1 => 's2Member POST vars verified through a POST back to PayPal®.',
    2 => 's2Member originating domain ( `$_SERVER["HTTP_HOST"]` ) validated.',
    3 => 'Not processing. Duplicate IPN.',
    4 => 's2Member `txn_type` identified as ( `web_accept|subscr_signup` ).',
    5 => 'Duplicate IPN. Already processed. This IPN will be ignored.',
  ),
  'subscr_gateway' => 'paypal',
  'subscr_id' => '69748567HX985362C',
)

Hello Pushparaj,

Please make sure you’re not using an account that already exists within s2Member. Also, please clear your browser cache and delete all your cookies when testing, otherwise s2Member might detect that you already registered.

Thanks for the heads up on this request for support.

A duplicate IPN error, indicates that s2Member already processed the return-data for this transaction, after the sale, in real-time. s2Member will ONLY process the return-data ONE time for each transaction. You might see an error like this if you attempt to bookmark a sale confirmation page.