We have 3 delivery types that are set on a voucher.
Stands for Voucher over Terminal. This means you get a voucher code that has to be given to your customer to top up there prepaid.
Stands for Voucher over SMS. The voucher will be send over the SMS. Your client has to enter there SMS code over to top up there prepaid.
Stands for Direct Top-Up. This means your customer get there new prepaid directly.
At the moment the API only support VOT for now.