Originally Posted by Family flyer
You can also do this with non-milehouds, such as a spouse.
This discussion is focused on iDine bonuses, but the tactic can also be used for topping off FF accounts. When I needed X amount to top off an account, I asked the waiter to charge one card for, say $20, and put the rest on another card linked to another account. No questions asked.
I've done this too with my sister's account. She had something like 24,948 miles in her Mileage Plus account. Since she does not fly very much, these miles were basically orphaned. So when dining, we used her idine CC, and her total climbed to 25,026 miles, and she used an award ticket!
26 orphaned miles is much better than just under 25K!