I was always told whatever specimen (my urine or someone else's) that you use the first time, make sure you use the second time. If the labs don't cross-match or cross reference I'm fine cause I'll use someone's clean urine. Is there anyway to find out?
My worry isn't substituting clean pee. It's because I took the 1st test with my urine and failed and I heard that if they use the same lab I need identical urine specimen(same person) or they will know
Long story short I'm 5-10, 180 athletic build. I was offered a job at let's call them Hospital A1 and was clean for 30 days after smoking frequently for a year so I decided to use my own urine. I don't do any other drugs or drink alcohol. I later failed the test for the A1 hospital (notified...