Bitcoin Transaction ID: usually located in your bitcoin wallet transaction history. It is a set of 64 hexadecimal characters (0-9 & a-f). For instance: 9f94d278a92b10e9abac033ff5f327a852c803da63bd2b9440bf6440e8bc1428
You can also check your transaction ID and other payment details on any blockchain explorer (like BitPay's block explorer Insight). Look up your transaction using the sending or receiving bitcoin addresses, which can all be found in your bitcoin wallet that sent the payment.
Paste your transaction ID into the created Request ID and Click Verify Transaction ID.
Last Updated: 13 Jan 2019