I just saw your post, as I haven't been on here for a long while. I completely disagree with Rbeck911. If you follow a strict chain of custody procedure with a COC form, with the urine sealed in the bag and the Lab COC copy in the proper place in the bag, and the seals over the top of the urine specimen container when you sealed the specimen with the employee's initials, then you are good. The employee is ALWAYS separated from the specimen once it is sealed! That is procedure. You do not have to send to an outside provider, who will then only send it out to a lab for confirmation. If you use an instant test, it is easiest to have the type that the urine remains in the same container, it offers a good seal against leaks, you seal/initial with the employee, put it in the bag, and send the whole thing off. If the seals across the top of the container are broken, the lab will not process it. The employee would have no case, as the protocol is foolproof if followed exactly. Only if there is an error in documentation or sealing would it be disputable. If you have an instant test, you can also always pour into a split specimen Labcorp or other lab tubes, and do the same seal, initial, etc. and send out as a split. I see no advantage at all to sending to an occ health provider that will only charge you more. And yes, the urine will keep overnight with no problems. I've done drug testing for quite a few years.