Only had to contact them once.
Front sight on my Urban Gray P01 died a few months after I bought it.
Got the return authorization e-mail the next day...
I bought a used 75B UG threaded with suppressor heights sights. Didn?t realize the front sight was dead until I got it home. Called CZ and their official position was ?we don?t warrant if not original buyer? but then the guy on the phone said ?but you know what, I?ve got one sitting here on my desk I?ll just mail it to you.?
Done.