Which scenario would likely lead to a currency conversion during a transaction?

A scenario where the currency of the customer's payment differs from the merchant's settling currency will likely lead to a currency conversion during a transaction. In this situation, when a customer makes a purchase in a currency that the merchant does not accept for settlement, a conversion must occur to translate the customer's payment into the merchant's preferred or required currency. This process typically involves using an exchange rate provided by financial institutions or payment processors to facilitate the conversion.

Currency conversion is essential in international transactions, where consumers may be using their local currency, while the merchant may have a specific currency they operate in, often based on their location or business preference. This ensures that both parties can complete the transaction without discrepancies related to currency differences.

In contrast, other scenarios provided do not inherently involve currency conversion. When transactions are made in cash or in cryptocurrencies, they generally involve a different set of considerations related to payment methods and not necessarily to currency conversion as understood in traditional financial transactions. Furthermore, a merchant's account being unverified would not directly lead to currency conversion; rather, it may affect the ability of the merchant to process payments altogether.