A New York couple, David Fitzhenry and Christine Herrick, nearly canceled their honeymoon in Mexico after realizing they had left all the gifts in a cab early Sunday, Newsday reports!
As officials started using GPS technology to try to figure out which taxi might have the wedding gifts in its trunk, cab driver Haron ur Rashid returned the gifts to the doorman of the couple's new apartment building. How nice of him! What a happy ending to what must have been a frantic night!

You can do the same with GPS tracking technology in limousines. I know that Stretch Limousine in Chicago uses the same technology.
Source: http://stretchlimochicago.com