Here are some of the common reasons a sample may be rejected: If the patient’s identifiers are missing. Identifiers include patient’s first and last name, as well as patient’s complete date of birth (DOB). If the patient identifiers on the sample do not match with the requisition, the sample will be rejected to avoid any discrepancies. If the sample cup arrives cracked or if the lid is not secured tightly and the sample leaks, we might reject the sample if the volume left is not enough to process. Or if the patient identifiers are no longer legible. If the sample volume is below 5mL, a recollection might be required, and the initial sample will be rejected. If the sample is past the stability range, we cannot confirm the validity of the sample and tests results and cannot be guaranteed as accurate.