In an effort to make youth sports payments easier and more efficient, Fiserv and Stack Sports have teamed up as Stack Sports will be using Fiserv’s digital payments SDK to allow payments from right inside the Stack Sports ecosystem. The Fiserv solution will make it easier to pay referees and other officials, as well as facilitate payments between coaches, all through a simple mobile solution. These digital payments will take the place of cash and checks and the occasional awkward conversation regarding late payments as well as last-minute trips to the bank. Source.