How is your TelSmart invoice paid with RES?
Are you a customer and have you agreed to pay 50% or 100% of your invoice with RES?
When you receive your monthly invoice, you may pay the amount excluding VAT with RES.
The VAT has to be paid by bank transfer and thus in €.
Hardware and software can also only be paid in €.
All information about RES can be found here: www.res.be