Lisa- i have been through & completed TPAPN. yes, for some reason, we have to call on the weekends but never get sent to test- because the labs are closed. to me, however, it was better to be in the habit of calling every day. i only ever gave urine- any other test would cost more- i don't know if they would ever request any other sample. i know my employer did talk with my case manager, but i have no idea what their conversation entailed. best of luck!! i had no problems with TPAPN other than a couple of dilute urines r/t being a coffee drinker. as long as you are clean & sober, don't take any OTC meds, & do your paperwork on time once you start work, it will be smooth sailing!!