In one section of a document I used
to have a footnote without number.
The problem is that it propagates through the whole document then and all footnotes appear to have no index.
How can I restrict the influence of this command to one particular footnote?
Update: I use unnumbered footnotes at the beginning of the chapter to specify, for instance, the version of software used throughout the chapter. It is common to do it like that in the community I am working.