If a registrant is unable to attend an event for any reason they may substitute, by arrangement with the registrar, someone else from the same institute/organisation.
If a registrant is unable to attend, and providing the conference organisers are informed in writing by the final date for payment that is displayed on the website for the event in question, a registrant can leave the fee paid with the organisers as payment towards a place at the same event or another Academic Conferences event that takes place in the 12 months following the originally booked event. In the case of a contributing author, the paper will not be published in the Conference Proceedings if the fee is held over for another conference.