Do I need to provide a medical certificate or parental authorization for children under 18?

Generally, this will be dependent on the activity. Written parental consent might be needed for some activities like Rafting and Canyoning if children under 18 are not accompanied by their parents. 

Please take a look at the product description of your activity to get more information regarding age requirements.
For further information, we recommend to directly contact the provider - which is easiest via the messaging platform on CheckYeti. Click here to login your CheckYeti account