I am a SPCA & US. I do most of my US work on night shift on an observation unit, where I basically just do admission orders. Upon getting the admission papers from the ED, I: scan the orders to pharmacy (so meds are being taken care of), stamp the orders as scanned, next I enter all orders into the computer, print out a list of everything I ordered, I add all orders to the Kardex info, print out a copy of the Kardex for my RN to check, add all meds to the MAR sheets, sign off my orders with my name, title, date, & time, and finally I flag the orders for the RN to check over, let me know if something needs to be changed, and then for him/her to sign off on the orders too.
ETA: At least 2 names have to be signed on all the orders, along with them being scanned in. I believe the night shift nurses on my unit generally go back and check to make sure all orders were signed off and done for the day. However I'm on an observation unit, so most patients aren't there for more than a day and the orders aren't piled up like a regular inpatient's orders.