A blockchain transaction hash (also called a transaction ID) is a unique set of characters assigned to every transaction.
Blockchain explorers like etherscan.io or ethtx.info can be used to review a transaction and find the transaction hash. The transaction hash is best sent by copying/pasting from your wallet or a block explorer. It's recommended to double check that you've copied the hash correctly.
It is not recommended to send screenshots of your transaction data, as they are not always clear enough to read and process the information. Sending screenshots may delay a support agent's resolution to your issue.