Accounts, payments and withdrawals
Why does a betting app ask for ID after I have already won?
Direct answer
In Great Britain, operators normally must verify age and identity BEFORE allowing gambling, not wait until withdrawal for checks that could have happened earlier. Additional legitimate AML/source-of-funds checks can still arise later. Other countries’ rules vary.
How to use this answer
This answer is based on the mathematical principle or published rule identified in the source below. If the question involves a live betting market, confirm its settlement definition before applying it to a specific bet.
Identity and anti-money-laundering checks can occur at withdrawal as well as registration; request the operator's stated KYC requirements.
The practical next step is to check the account history, verification request and the provider’s payment rules. Transfer times, identification and dispute handling can differ by provider and payment method.
Reference: gamblingcommission.gov.uk · published rules or source ↗