To use the Trip.com coupons on their website, you need to meet the conditions:

•  The items you choose must meet all coupon requirements as explained in the Terms and Conditions.

• The coupon has not expired. 

• The seller uses the Trip.com checkout system or a customized checkout system that accepts the coupon.

Of course not, most coupons may be used only by you when you received them directly from Trip.com. As the Trip.com coupon includes your User ID, it cannot be resold or transferred in any way.

Normally, most of the websites you can print the grocery coupons from only work on a computer, even you can get coupon books mailed to your home for free. But it completely depends on Trip.com's support program at the time you search, so please visit the Trip.com site to know more details.

Most Big Discount Events of the year witnessed a vast number of coupons from Trip.com released. Especially, on federal holidays such as New Year’s Sale, Thanksgiving, Christmas... or on other important days such as Valentine’s Day, Easter, and Father’s Day..., customers also can buy at Trip.com with numerous coupons.

Usually, Coupon Stacking is not allowed at Trip.com. However, the store will surely give out notice if available.

Yes, it has ever. It may not be available now, but it is completely possible for loyal customers of Trip.com to get it by tracking all of its promotion programs.