I'm sending invites to 3 sets of guests in Canada. Do I put postage on their response envelopes? I'm assuming that I cannot buy Canadien postage at the U.S. post office, correct? I can order a sheet of 4 USA-delivery stamps online from the Canada Post, but my shipping will cost as much as the stamps and I'm not sure if the stamps will arrive early enough (I plan to send out my invites a week from today). What does E suggest?
TIA!