All RecruitiFi placements are logged in $USD on the date that the employer makes a hire.
At the moment a hire is logged, the conversion rate between USD and the foreign currency is calculated based upon Google Finance's conversion rate. The conversion rate is applied to your fee, and a payout amount is calculated and converted into USD. All invoicing is in USD.
Since the service is provided at the time a hire is logged, the conversion rate must be recorded at that point in time and the payout amount finalized.