Originally Posted by
star_world
By customs you mean immigration, right?
It is certainly possible that a different / shortened name (compared with passport) used on an international ticket could cause some issues. Much more likely if the last name is spelled differently, but still possible with a first name.
The only reason immigration could ask to see the ticket is to ensure a return date for a visitor coming into the country, and in that case the difference in name certainly won´t matter.
The only organization that has stated that tickets must have the exact same name as ID is the TSA.