if you are trying to recharge your friend's phone using a voucher..
call Boost 1258881 or Live Chat to do that for you.
If you are using a Credit Card / debit Card
go to boost.com.au/recharge and manually enter your friend's mobile phone number
If you were able to get the answer pls don't forget to mark the post as an Accepted Solution. If you also found someone helpful do not forget to give them Kudos to show your appreciation." None of us here are working for Boost or Telstra we are just here to help and share. -nefy-