DASH transfers are only available in electronic form on the regional SmarTrip® Card. 

If you pay your fare with a SmarTrip® Card, a transfer will be automatically added to your card. DASH transfers are good for up to 4 hours and are honored on all DASH routes in any direction.  DASH transfers on SmarTrip® Cards are honored on Metrobus and participating local bus systems for up to 2 hours. Additional charges may apply when transferring to other services.