@dynamitemedia When a user makes a deposit with this coin adapter, the CoinPayments platform attempts to send an IPN to your site, and it usually attempts up to 10 times before it fails. If your site is down, or if there is a connectivity issue, or if a firewall does not allow the incoming message to go throough, then it might be necessary to resend the IPN. But normally this should not happen.
When you resent the IPNs, were they successful this time?
(Keep in mind that unless you go through the KYC verification process that was announced recently, you might lose access to their API, but that can be resolved if you perform the verification.)
with regards