Settling "Do online casinos pay?" means knowing which question is being asked. Money goes in with almost no questions and comes out with several, and that asymmetry catches most people at their first withdrawal. A casino is obliged to know who it is paying, where that person lives and where the money being staked came from, and it usually asks at the moment it is about to pay rather than when the account opened. Knowing which three checks exist, and what satisfies each, turns a stalled payout into a short errand.
An answer that will not come has consequences worth knowing in advance. An account that cannot satisfy a source of funds request is usually frozen rather than closed, with the balance held until it can, and the deposits already made are normally returnable to their origin. That is the reason to deposit from an account in the same name from the start: every check further down the line reads more easily for a paper trail that began in the right place.
Proof of address is the second, and the document that satisfies it is dated. A council letter, a bank statement or a utility bill from the last three months carries a name and an address on the same page, which is the whole point of it; a bill from last year does not. Screenshots of online banking usually pass where they show the bank's name, the account holder and the address together, and fail where a balance is all they show.
Quick answers
When does each payout check usually arrive?
Identity and address are often asked once; source of funds comes later, when totals through the account cross a threshold the operator does not publish.
What causes most identity check rejections?
A name that differs from the account name, such as a shortened first name, a maiden name or a middle name shown in only one place.
Which answers to a source of funds check are acceptable?
A salary, a pension, a redundancy payment or a house sale are all ordinary answers, provided paperwork backs them up.
What does a source of funds check ask for?
Documents rather than explanations: payslips, a tax return, a contract of sale or a statement showing money arriving from a named employer.