Originally Posted by kkua
I would proceed with caution with their web booking engine. It almost never works. That airline (as highly rated as it is) has the worst web support. If you want your mileage, then I would suggest going paper on MH. Their electronic ticketing system is a complete joke. By travelling on paper tickets, you have some evidence to send to WorldPerks service center in case mileage is not posted.
I echo everything that
kkua said. A long, long time ago I tried to earn miles on MH's own "Enrich" frequent flyer program on a Y ticket, and for some unknown reason, they didn't credit the miles. Later I mailed the paper tickets to Worldperks and received the credit on my NW account without problems.