A Note on Donation Currency
When the Seamless Donations plugin displays a donation form, it shows a default donation currency. The default donation currency is determined based on a hierarchy of most-specific to most-general. The most specific is if a donation currency is specified in the Campaign; if not, then perhaps a donation currency was specified for the Cause. If neither, then the default donation currency of Seamless Donations is used as configured in the Form Options control panel.