I would talk to your client and see if where they are sending it has the capability to read NTSC (if that is what you are). If not, find out what they need to make it work and go from there. Most people can read other regions now days without issue. I inserted a DVD coded for another region into my DVD player in my pc and it asked me if I wanted to change my region to play it. I did and then afterwards I changed it back by inserting a NTSC region 1 dvd into the player.
Find out from your client what capability they have on their end.
j razz
https://www.jrazzcreations.com