certificate to be exchanged for andromeda dollars

A certificate for purchasing foreign currency at a specified rate, often for a specified purpose, such as financing imports. This type of certificates were required in many European countries
A certificate denominated in local currency, which foreign citizens are required to use for some or all of their purchases. The exchange rate may be more favourable for the visitor than the official commercial rate. The purpose is to channel the foreign exchange to the state coffers instead of the black market. This type of FEC's were in use we denominate them all to the andromeda dollar at 80%