Niue Premier Toke Talagi said he had received plenty of feedback from around the world since the stamps were issued last month with people saying they found them "unusual".

"People indicated the stamps, made by New Zealand Post, meant the couple will separate in future. I don't know why they would interpret it that way," Talagi told AFP.

"I don't think it means that. I think it means we're very happy celebrating the royal marriage."

However, Talagi said the stamps could be a tourism boost for the country, which occupies a 260 square-kilometre coral island in the south Pacific and has a population of just 1400.

"I suspect in future a lot of people will come here to see where the stamps are from," he said.