How does a random drug test work?

In a private business environment?

Do they send you to a lab that same day to get tested? Or to a lab within the week?

Or do the business send someone there and collect your urine on the spot?

If anyone know the answer or had a random drug test done on them, please respond.

Thank you.

 

its most always done at a testing center. with notice.

 

alot of times they will suprise you and when you get there, they will send you to a back room with a bathroom and stand at the door and watch you piss in a cup. thats will alot of jobs iv had though.. maybe its different where you are. but dont always think it will be at a testing center because alot of times its not...