Undocumented Facebook

This page is intended to keep notes of “features” undocumented by Facebook.

API

Poke

There is no official way to make a poke through Graph API calls. (source)

Posts

In any status, post or chat message, if you use [[fb_unique_id]] or [[fb_username]] (between double brackets), it will get converted to the “profile” icon of that user or page id. (source)

@[fb_unique_id:0] will be converted into a link to that user profile or page. (ref)

It is not possible to post yopmail.com addresses in chat or status. Although it is possible to use yopmail known aliases.

User information

The date of your birth can only be changed 4 times. (based on experience by Andre Castro)