As a lender you need to have two paybills: One for disbursing Loans (B2C Paybill) and another for Receiving Loans (C2B Paybill). Application for this paybills is FREE and Presta doesn’t charge anything for linking this Paybills to your account.
1) C2B Paybill.
This paybill allow you to collect loans from your customers. Here are important links to guide you.
2) B2B Application
This is an application to safaricom allowing you to transfer the money between the two paybills. Here are the application form.
3) B2C Paybill.
This paybill allow you to disburse loans from your customers. Below is a link of the requirements and application letter.