need create party for RFC?

Hi friends,

   i am using 7.3.1 single stack. my interface is file servere( SFTP) party------- then send to RFC(Bapi) SAP System

   here i have doubt i need to create for Party for RFC?

   before i created RFC bussines component with out party

  when i am creating reciver in ICO showing only party Bussiness components only. i am unable to see the RFC bussiness component in that list.

  please let me know here ineed to create Psrty for RFC?

can we create party for RFCs, IDOCs?

Thanks

G.bhanuPrakash