EVD (Electronic Voucher Distribution) is the proper product to be used
by mobile operators or service providers in which products, goods, PINs
or subscription services can be sold out as top-up transactions or printed
vouchers instead of using plastic cards which would increase sales channels
and minimize cost of plastic printing. Electronic vouchers are linked to a
pool of identifiers which can be linked to the charging gateway of any
mobile operator or service provider to control pricing and denomination