With "What is casino withdrawal time?" 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 payment page shows. Most failed crypto payments come from a mismatch in one of those details, and very few can be undone after sending.
Withdrawals run the same route in reverse: the player supplies an address, and the casino sends coins on the network it supports. An address from a wallet or exchange that does not support that network can lose the payment, so the receiving side deserves the same care as the sending one. A small test transfer before a large one costs one extra fee and confirms the whole route, including any tag the receiving account requires.
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.
Further questions
What happens to coins sent below the minimum deposit?
Undersized deposits are often never credited, because processing them would cost the casino more than the coins are worth.
Who pays the network fee on a coin transfer?
The sender pays it at the moment of sending, and its size depends on how much demand the network faces right then.
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.
What is a memo or destination tag for?
Some networks need it to tell the casino which account the coins belong to; without it, the transfer waits for support to match it manually.