Not where I go. Double check because it is do easy yo samples mixed up like. You label the tube then if you can’t get blood they go back in the tray. Guess it would happen more when you go from bed to bed in the hospital esp at 5 am in the morning.Interesting. I feel like every blood test I've ever taken the tube already had a sticker on it. I always wondered if they get samples mixed up from time to time