Transport card
A transport card or transport pass was a permit issued by the Ardanan citizens who inhabited the city of Stratos. This permit allowed Troglytes to enter the city and move about it without question. 

In 2269, Plasus questioned a Troglyte who had been found without a transport card. The man claimed it had been lost when Plasus's sentinels attacked him.  

Later, Vanna told James T. Kirk that they would need one to leave Stratos. ()
Identification technology