The British government who had exercized a protectorate over the Cook Islands group since the 1880s, handed the islands including Aitutaki to New Zealand administration in 1901. Cook Islands stamps were used from 1932 to 1972
On 9 August 1972 Aitutaki became a port of entry into the Cook Islands. Although part of the Cook Islands, Aitutaki has a separate postal service.
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