What is electronic payment?
There are some highly secure site through which those companies paid you. Then those site transfer your credit to you bank account or to your debit/ credit card.
What you have to do for electronic payment?
You have to register with that highly secure site. After successfully registration, you will have an account with that site. When you redeemed/ withdraw your balance from a site, you have to mention your account and that site name in which you already have registered for that account.
You feel free to contact business2mch@yahoo.com for any query