What constitutes prescription proof for a drug screen?

When the laboratory releases a positive result to the MRO or medical review officer, the physician then contacts the donor to give the donor an opportunity to disclose a possible medication or dietary supplement that could have resulted in the current positive finding on the laboratory report. If the donor provides information regarding legal medication prescribed in their name, then the MRO then verifies this information to be true by asking the donor to provide either a pharmacy phone number where the medication has been filled or to provide a prescription profile verifying the medication was received PRIOR to the drug screen. Contact with the prescribing physian may also be required. With the easy of altering photos and documents, a picture or copy of the prescription  or prescription bottle alone would not constitute prescription proof for a drug screen.