This especially refers to NEBOSH Courses, the details can be found under Policies 

Appeal policy https://www.nebosh.org.uk/policies-and-procedures/appeals-policy/

Enquiries About Result: https://www.nebosh.org.uk/policies-and-procedures/enquiries-about-results-ears/

These procedures are online and complete information are given in these section, also documents can be downloaded to get details.

Learners are requested ti have complete information making an appeal about the appeal period, types of appeal, fees for appeal and time that is likely to take place.