That depends on the type of ticket you purchased.
eTickets - no need for you to do anything except fill out the automated refund form. You can then sit back and relax and your refund will appear within 10 daysor so - how easy is that?
If you haven't yet collected your tickets from the machine - no need for you to collect them to get your refund. Just fill out the automated refund form and your refund will appear within 10 days or so.
If you have already collected your tickets from the machine - not to worry. Just post your tickets back to us at the address below by tracked delivery. Once we receive your ticket, we will process your refund within 5 working days.
Virgin Trains Ticketing Refunds
PO Box 1259
However you request a refund, the money will be refunded to the original account or card the tickets were purchased with. Your refund will be processed once any tickets have been received in 5-10 days, and your account will be credited minus any administration fee that is due (normally £10 per ticket)