Log sheets or tracking documents are an important part of your job. It is critical that you provide the date(s) and time(s) of pick up(s), as well as the location(s) and the condition of the sample(s). You will also have to time stamp the date and time of delivery to ensure that the specimen has not been compromised. Many organizations use automated specimen tracking systems, and couriers often use barcode scanners when picking up or dropping off specimens.