Originally Posted by Points Scrounger

Yes, with two possible exceptions: 1) The restaurant is not giving any miles that day (blacked out from participating - you'll see an X under that date at their Rewards Network listing if that's the case, or 2) It is a one-visit-per-month joint, and you've already dined there previously in the same calendar month [with the same airline - a different airline is okay].

Otherwise, any charge (inc gift certs) they run through the credit card machine should be fine. HOLD ON TO YOUR RECEIPTS UNTIL THEY POST!