just received more money than i withdrew. What should i do?

[Zangieff]

I requested a cashout about two weeks ago and finally got my monies in the mail. Turns out they incorrectly processed my cashout by giving me an extra 1500 dollars. I dont see this getting by their payment department, and even if it does, for how long? Anyway, what should i do? Seems like the best option is just reporting this to their support team. Any other suggestions?