Before permanently filing a source document, quality control (QC) personnel must check it for?

The correct choice is valid because ensuring the validity of a source document is a critical step before it is permanently filed. Validity refers to the document's ability to accurately represent the information it is intended to convey, confirming that it meets the necessary standards and criteria for recording data. This is essential in the context of medical material management, where documentation can impact patient care, regulatory compliance, and inventory management.

Quality control personnel need to be confident that the information captured is not only accurate but also truthful and reliable within the context it will be used. Valid documents help ensure that decisions made based on this information are well-founded, which is paramount in a medical environment.

While accuracy, relevance, and completeness are also important qualities to consider in source documentation, the primary concern before filing is whether the document itself is valid. Ensuring validity helps to affirm that the information is legitimate and supports the integrity of the overall database or record-keeping system.