do (something) at (one's) own risk

To do something with the foreknowledge or forewarning that there is implied risk or danger that one must accept as one's own responsibility. When you choose to gamble, you do so at your own risk. When you buy a house sight unseen, you definitely do so at your own risk. The boss just found out about the massive printing error, so go into his office at your own risk.

do something at your ˌown ˈrisk

do something even though you have been warned about the possible dangers and will have to take responsibility for anything bad that happens: Persons swimming beyond this point do so at their own risk (= on a notice). ♢ Valuables are left at their owner’s risk (= on a notice).