Support » Plugin: Payment Gateway for WooCommerce » HMAC signature does not match

  • Resolved miks2u


    I confirmed that Merchant ID and IPN Secret match, but I keep getting Invalid IPN notices from my WooCommerce + Coinpayments setup. Do I need a value specified for IPN URL, or API keys?

    Thanks for any assistance you can throw my way. It’s all working great except for that 🙂

    The page I need help with: [log in to see the link]

Viewing 6 replies - 1 through 6 (of 6 total)
  • Plugin Author CoinPayments


    Remember from the stickied post in this forum if you need any assistance to post a ticket at

    Tags: bitcoin, litecoin, altcoins, altcoin, dogecoin, feathercoin, netcoin, peercoin, blackcoin, darkcoin, ripple, ethereum, ether, woocommerce
    5 5 Requires at least: 3.7.0
    6 Tested up to: 4.6.1
    6 Tested up to: 4.9.2
    7 7 Stable tag: 1.0.10
    8 8 License: GPLv2 or later

    Hey @miks2u, did you have any success in resolving this issue?

    I am having the exact same problem, down to a T. I have had developers working on it for about a week with no resolve. My domain providers cant find an issue, and CoinPayments gives me automated responses from a bot (even through official ticketed support system).

    Any help would be much appreciated!

    Plugin Author CoinPayments


    @beauccamedia Remember if the bot doesn’t answer your question just reply to it and a human will see it.

    Some systems have trouble if there are special characters in your IPN Secret, you may want a longer one that is all letters/numbers versus one with special characters if there are any in yours.

    @coinpayments ok no worries. Ill keep that in mind next support request.

    I changed the IPN secret to just numbers and letters per your comment, and unfortunately the HMAC error persists.

    Any other thoughts as to what might be the issue? If its helps, I am using WooCommerce.


    Plugin Author CoinPayments


    Best thing to do would be to post a ticket so support can help you directly.

Viewing 6 replies - 1 through 6 (of 6 total)
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