I have to take a piss test tomorrow for probation. I drank a lot on Friday night. Somebody told me that my po has a test that can tell if you drank within 7 days. Is this true? If so, what can be done to prevent failing.

Take your, piss test as you call it, and find out.

I'm assuming that you knew that urine tests were part of your probation, yet you still decided to drink.

No one on this site is going to help you pass a urine test, that would be illegal.

So, if they find out then it's time to pay the piper.

The only thing that can be done to pass, is not to drink!