All currencies are accepted in the Basware PDF e-Invoice service. Requirements are:

• Currency must be present in the invoice.
• Currency must be text, not a picture pasted in the PDF.
• Currency must be identifiable.
  For example:
  • Euro, EUR, Eur, EURO, €
  • GBP, £
  • USD, US DOLLARS, $

For other currencies we recommend to follow the ISO4217 standard.
For example:
http://www.oanda.com/help/currency-iso-code-country

The above link is provided as example only, and solely for informational purpose.