\documentclass[a4paper]{article}
% test file for fixfoot.sty -- see that file for licence conditions
% first release to ctan 2000/02/09
\usepackage{fixfoot}
\DeclareFixedFootnote{\blah}{blah di blah}
\begin{document}
    \noindent       here we are again\blah
\par\noindent       happy as can be\blah
\clearpage\noindent all good friends\blah
\par\noindent       and jolly good company\blah
\end{document}