Refund Policy

All cancellations requests must be made in writing to sigma@sigma.org.

Requests received before Sept. 28, 2020 will receive a full refund. 
Requests received between Sept. 28, and Oct. 19, 2020 will receive a 50% refund.
Refunds will not be issued after Oct. 19, 2020

If hotel rooms have been reserved in the SIGMA block, they must be cancelled prior to receiving any eligible refund.