Can I change/amend my booking?
It may be possible to amend your booking, however this depends upon the type of amendment required and is at the discretion of the travel service provider. Contact Viator Customer Service with your current Viator booking number and specific details of your amendment, and we will be able to advise if the change/amendment is possible. Please select your tour carefully, as not all travel service providers will accept changes/amendments once you have received confirmation of your booking. As per the Terms and Conditions
some sales attract change/amendment and cancellation penalties.