The registration fee is fully refundable for cancellations received on or before September 14, 2017. Cancellations received after September 14, 2017 and on or before September 28, 2017, will receive a refund, less a $50 processing fee. Cancellations received after September 28, 2017, will not receive a refund. All cancellations and requests for refunds must be made in writing. E-mail to the attention of Jeremy Persin at email@example.com. All refunds will be mailed within four weeks after the date of the conference. Substitutions may be made at any time without charge, but must be submitted in writing.