Zimbabwe has introduced a number of currency reforms since the beginning of 2019. Of note are the Statutory Instruments 142 (SI142) and SI16 enacted in March 2019, which replaced the multi-currency regime with the Zimbabwe dollar as legal tender, rendering all other currencies illegal. These events constitute a unique opportunity to carry out a “natural experiment”. We used the opportunity to explore the impact of the currency changes on Zimbabweans’ protective PIN shielding behaviours. Our study was carried out spanning both the multi-currency and Zimbabwe Dollar (ZWL) currency periods. We observed far less PIN shielding than in comparable studies in other countries, and we suggest that this is due to uncertainty and reduced currency values. In essence, this was a natural experiment into the impact of currency changes on citizen behaviours, and what we discovered revealed an unexpected real-life risk homeostasis response.