What A Confirmation Is
When you send Bitcoin or Ethereum to a casino, the transaction enters the network. Network nodes verify the transaction. Miners include it in a block. That block gets added to the blockchain. That's one confirmation.
One confirmation means your transaction is now part of the permanent record. It has been verified by network consensus. It cannot be undone by you alone.
Each subsequent block that gets added to the blockchain after your transaction counts as an additional confirmation. So if your transaction is in block 800,000 and the current block is 800,003, you have three confirmations.
The Security Model
More confirmations mean greater security against a "double-spend" attack, where someone tries to reverse the transaction and send the same crypto elsewhere. One confirmation is generally secure against casual attacks. Six confirmations is secure against determined attackers. Thirty confirmations is secure against basically any realistic attack.
For a $100 deposit, one confirmation is probably sufficient. For a $10,000 deposit, most casinos recommend waiting for six confirmations before crediting your account.
The Timeline
Bitcoin blocks are added approximately every 10 minutes. Ethereum blocks every 12 seconds. So:
Bitcoin: 1 confirmation = 10 minutes, 6 confirmations = 60 minutes. Ethereum: 1 confirmation = 12 seconds, 6 confirmations = 72 seconds.
This is why Ethereum deposits are faster than Bitcoin deposits. The blockchain is processing blocks more frequently.
The Fee Structure
You can speed up confirmation time by paying a higher transaction fee. Higher fees incentivize miners to prioritize your transaction in the next block.
During periods of high network congestion, fees spike. A Bitcoin transaction that normally costs $1-5 might cost $20-100 during high demand. The casino can't pay your fee for you (they don't control your wallet), so slow transaction times during congestion are your responsibility to manage.
Ethereum uses gas fees with similar mechanics. High congestion, higher gas. Low congestion, lower gas.
The Casino Process
Reputable casinos will show you a transaction ID (txid) when you initiate a deposit. You can search that txid on a blockchain explorer (blockchain.com, etherscan.io) and see:
- The exact transaction amount
- The current confirmation count
- The fee paid
- The wallet address it's going to
If the casino doesn't provide a txid, or if you can't find the transaction on the blockchain explorer, something is wrong. Either the transaction didn't actually go out, or the address is fraudulent.
The Risk
The risk in accepting deposits too quickly (before confirmations) is that a casino credits your account and you start playing before the transaction is actually confirmed. Then the transaction fails. The casino is out the money. This is why casinos wait.
From your perspective, once your transaction has three confirmations, you're safe. It's effectively permanent. Even if the network forks, your transaction will be preserved in the longest chain.
The Check
Before you panic about a deposit taking 20 minutes to arrive at a casino, check the blockchain explorer. If your transaction has three or more confirmations, the transaction is complete. If the casino hasn't credited your account, it's a casino-side issue, not a blockchain issue.
If your transaction has zero confirmations, it's still in the mempool waiting to be included in a block. Wait. It will eventually be confirmed unless the network is catastrophically congested.
Understanding confirmations removes the mystery from crypto deposits and lets you see exactly what's happening with your money.
