What method is not acceptable for verifying a warrant to ascertain the correct ID of an inmate?

Verbal verification is not an acceptable method for verifying a warrant to ascertain the correct identification of an inmate. This method relies heavily on spoken communication, which can lead to misunderstandings and inaccuracies. Verbal verification does not provide tangible evidence and may lack the necessary corroboration required in a legal context.

In contrast, the other methods mentioned involve more reliable and documented approaches. Physical description comparison relies on specific identifying characteristics, some of which can be essential when matching an inmate to a warrant. Document authentication involves reviewing official paperwork, such as warrants or identification documents, to verify the information against established criteria. Visual identification through records allows for cross-referencing with documented data, ensuring that the information matches with what's provided in the warrant. Each of these methods provides a more concrete basis for confirming an inmate's identity compared to verbal communication alone.