What is a TXID?
DefinitionA TXID, or transaction hash, is the unique identifier of a blockchain transaction: a long string of letters and numbers calculated from the transaction’s data. With it, anyone can look up the transfer on a block explorer and see its status, amount and addresses.
How a transaction hash is created
A transaction hash is created by running the transaction’s data through a hash function, which produces a fixed-length fingerprint. Change a single detail and the hash changes completely, so each TXID points to exactly one transaction.
Formats differ by network. Bitcoin and Tron show 64 hexadecimal characters, while Ethereum and other EVM networks put 0x in front of them. On TON, one transfer can involve several transactions and messages, so an explorer may show more than one hash for it.
When you need a TXID
Keep the TXID of any important transfer. You will need it for:
- Proving that you sent a payment, for example to a seller or a business
- Asking an exchange to find a deposit that hasn’t appeared yet
- Recovering a deposit sent without the required memo
- Checking confirmations, or whether a transfer failed
- Recording a crypto sale on an invoice or in your books
What a TXID proves, and what it doesn’t
A TXID shows what happened on-chain: the sending and receiving addresses, the amount, the fee, the time and the status. It doesn’t show who owns those addresses.
Be careful with screenshots offered as proof of payment. A TXID only proves a payment once you look it up yourself and check that the network, the receiving address, the token and the amount all match. A fake screenshot or a hash from another network proves nothing.
Transaction hashes in Waletifi
In Waletifi, invoices and receipts for business payments list the payment network and the transaction hashes, so anyone can check the payment on the blockchain. Sharing a TXID is safe: it reveals the transfer’s public details but never gives anyone access to your wallet.
