From PDGA Competition Manual Page 2:

 

D. No refunds will be issued after the 7th day prior to the start of the event, but the player shall be sent a player’s package if one was provided to event competitors.

E. Withdrawals made before the 7th day prior to the start of the event shall receive a 50% refund.

F. Withdrawals made 14 days prior to the start of the event shall be refunded 100 %, less postage and handling, which shall not exceed 10% of the entry fee.