Confirmation
A block mined on top of the one holding your transaction; each extra confirmation makes reversal less likely.
A transaction gets its first confirmation when it is included in a block, and one more with each block that follows. On proof-of-work chains such as Bitcoin, undoing a transaction means redoing the work of every block stacked above it, so each confirmation adds certainty.
Effect on your deposits
A crypto cashier holds a deposit until it reaches a required confirmation count, which depends on the casino and the coin. One to three is typical for Bitcoin. Faster chains may ask for more blocks yet still clear sooner in minutes. Bigger deposits can require extra confirmations.
Timing illustration
Suppose the casino wants 2 Bitcoin confirmations. Blocks arrive roughly every 10 minutes on average, so a deposit generally shows up in your balance about 20 minutes after sending. Block intervals vary, though, and an underpriced fee can stretch the wait considerably.
Troubleshooting a stuck deposit
- Paste the transaction hash into a block explorer and check the confirmation count.
- Zero confirmations usually points to a fee that was set too low. Some wallets let you bump it.
- When the required count is reached and nothing is credited, send the hash to support.