Reissue are not always permitted and the fee is at the discretion of the event organiser.
You can confirm whether reissues are available and the associated fee by checking the terms & conditions found in your confirmation email.
To reissue (change the name on the ticket) the original purchaser must login to their moshtix account and click the Reissue button for the relevant event and follow the prompts.
*Reissues do not apply to Splendour in the Grass