Dear fellow Reddheads:
Some of you have asked about whether it’s possible to tip someone on Reddit through private messages. Yes you can. The method so far is not documented and will be added to Wiki shortly.
The command is: +/u/reddtipbot
You should put the entire command above in the body of a PM to /u/reddtipbot and don’t forget the @ in front of the username without the /u/ bit. You can put anything in the title of the PM.