With "What is a wallet address?" in mind, one rule covers most of it: every detail must line up before coins are sent. A coin deposit travels on a public network, and the casino only sees it once that network has confirmed the transfer. The coin, the network it runs on, the address and sometimes a memo all have to match what the cashier page shows. Most failed crypto payments come from a mismatch in a single one of those details, and very few can be undone after sending.
Every transfer pays a fee to the network, set by demand at the moment of sending and paid by the sender. The casino may add its own charge on withdrawals, and it sets a minimum deposit for each coin. Coins sent below that minimum are often never credited, because processing them would cost more than they are worth. On a crowded network the fee alone can swallow a small deposit, so the timing of a transfer matters as well.
A transfer is credited after the network has confirmed it a set number of times, and the casino decides how many confirmations it waits for. On a fast network that takes seconds; on a busy or slower one it can take an hour or more. A deposit that shows as sent in the wallet but not yet in the account is usually still collecting confirmations, and the transaction hash lets anyone follow its progress on a public block explorer.
A deposit address is long and unforgiving, so it is safer pasted from the cashier than typed by hand. Some networks also need a memo or destination tag that tells the casino which account the coins belong to. A transfer without the tag reaches the casino's shared address with no owner attached, and it waits for support to match it manually. Copying both fields fresh for every deposit avoids sending to an address the casino has since retired.
Questions on this topic
Is a small test transfer worth the extra fee?
Sending a small amount first costs one more fee but confirms the whole route, address and tag included, before a larger sum moves.
When is a crypto deposit credited to the account?
After the network confirms the transfer a set number of times, which the casino chooses; that takes seconds on fast networks and an hour or more on busy ones.
Should a deposit address be typed by hand?
No. Addresses are long and unforgiving, so pasting the full address fresh from the cashier for every deposit is far safer.
Why does the network matter for a coin deposit?
Many coins run on several networks, and a casino accepts each on only one or two; coins sent on another network may reach an address nobody watches.