When you are on the home page (as on the other pages), simply click on the “send” icon.
You will land on the page where you have to enter a number. On the part where numbers are suggested, you must click on “choose contact”.
If the number you are interested in is not on this contact page, click on “add account”. You will have to choose which type of account you want to add (mobile money, PaySika) then put the number you want to send money to and save.
You can now send money to your friend on PaySika without any problem.