Trip.com modification cases

Modification Case	V3 Connection	V4 Connection
Apply direct modifications via API	❌ Not supported	✅ Supported (except 4–5 star hotels)
Guest names	Trip.com send these modification requests through offline confirmation method to the hotel.	API (except 4–5 star hotels)
Contact information
Special requests
Stay dates
Change number of rooms booked		Trip.com send these modification requests through offline confirmation method to the hotel.
Change room type	Trip.com will cancel the original booking and then create a new one.
Change booked product

*Note: The star rating is based on the hotel setting on Trip.com's end.

This article explains how Trip.com booking modifications are handled depending on the connection version (V3 or V4), and which types of changes are supported via API or must be handled offline.