Here's the NETRC file:

:print netrc.pub
machine "remsys.hp.com" login "jeff.vance" password "uPass,aPass"
default login "mgr.sys" password "u1,a1"

:setvar _sftp_debug false  -- or -- :deletevar _sftp_debug
:
:sftpput catalog.pub.sys, remsys.cup.hp.com  <-- note no username

   --- SFTPPUT ---   version A.05

   ** encrypting file  : /SYS/PUB/CATALOG
   ** transferring file: /SYS/PUB/CATALOG

=====================================================
1 file transferred successfully.
1 file was encrypted.