Bitlish Vouchers (Vouchers) are the way to transfer funds between registered Bitlish customers. It is free of charge, and no commission is taken or whatsoever.
How do you use it?
If you want to send funds to any other Bitlish customer, you create a voucher in any currency that Bitlish supports. Once you have created it, you copy the voucher code (that long line of letters and numbers) and send it to a person you want. That person logs in to Bitlish, goes to Redeem voucher, pastes the code and instantly gets the funds to his/her appropriate account balance. That is it.
If for some reason you want to cancel the voucher, you just redeem it by yourself. The funds are got back to your account and nobody else can redeem this voucher anymore.