A friend in panic:
** *[publication-link id="638"]
- ** Object : Urgent: cancel my invitation ** *
Two good news: 1 - It's simple. 2 - it's fast.
Go to the page of the person in question and, in the left column, under the portrait, under the extract that follows him from his list of friends, you will find a link written in very small letters: "Cancel invitation".
It's that simple ;)
Facebook: 15 small lines of the contract...