The collector's signature is a crucial part of the specimen collection process for drug testing. According to the DOT Rule 49 CFR Part 40 Section 40.203, if the collector's signature is omitted on the certification statement on the Federal Drug Testing Custody and Control Form (CCF), it is considered a correctable flaw that must be addressed. The MRO (Medical Review Officer) must cancel the test unless the flaw is corrected. Additionally, the collector's printed name is required, but the collector's signature is properly recorded
. These requirements ensure the integrity and authenticity of the specimen collection process.
