Winnings can get reclaimed by processor?

I am fairly new to online casinos and play at couple of times and was lucky enough to win $500. After 10 days I received a check from a Canadian bank and deposited to my ABSA account. I was than notified the amount will be credited, but processor can reclaim funds in future.

How can anybody reclaim this money? I won it and it’s mine!

Marcus is the best person to reply here:

First of all, don’t worry! Your check is a payout of winnings and therefore the payment processor won’t have any reason to reclaim the funds. There are cases where customers receive checks twice or a check has been sent to a wrong address and than a processor would reclaim funds. The agreement between the processor and the bank allows the processor to reclaim funds if they can prove bank with an appropriate reason.