Double check the beneficiary's bank details against the details in the payment confirmation and make sure they match. If they are correct, then your beneficiary will need to follow up with their bank.
[Check] To help avoid payment delays, always reference your payments clearly and pass the reference details onto the beneficiary so they know to look for it.
However, if the bank details are incorrect, then please contact support to arrange a trace to attempt to locate the funds. Please note a trace can only be initiated for Priority (SWIFT) payments and for Regular payments made in USD. It is not possible to initiate a trace for any Regular payment other than USD. A trace is done on a "best endeavours" basis and does not guarantee the location or retrieval of the payment. A trace will incur a service fee (please refer to your contract).