When a donor behaves in a confrontational way that disrupts the collection process, such as refusing to empty pockets or refusing to wash hands after being directed to do so by the collector, this is considered interfering with the testing process and is considered a refusal to test. The collector must contact the Designated Employer Representative (DER) about the refusal as soon as is practical.

If a donor makes an attempt to provide a specimen and the quantity is not sufficient (QNS) and the donor refuses to make a second attempt to provide another urine specimen or leaves the collection site before the collection process is completed, this is considered a refusal to test. The collector must contact the DER about the refusal as soon as is practical.