Indonesian rupiah
After the war, from 1950 the Riau archipelago was a duty-free zone till the Indonesia-Malaysia confrontation in 1963. During this period, the Malaya and British Borneo dollar used in British Malaya was the principal currency in the region. Visa free movement of people, which existed then is now no more prevalent. To affirm its fiscal stake in the region, a decree was passed on 15 October 1963 to replace the Malaya and British Borneo dollar (the circulating currency) with an Indonesian-issued currency, the Riau rupiah, which replaced the dollar at par. Although the rupiah resembled the Indonesian rupiah in appearance, it had a much higher value. Malayan money was withdrawn from 1 November 1963. The Riau rupiah was exchangeable as a foreign currency with the Indonesian rupiah. Since 1 July 1964, the Riau rupiah was no longer a valid currency, being replaced by the Indonesian rupiah at a rate of 1 Riau rupiah = 14.7 Indonesian rupiah.