Adding a footer to the first page [closed]

Question

I am required to use a custom LaTeX class. This class internally uses fancyhdr and, no matter how much I try, I cannot add a footer to the first page. The footer can appear on other pages but not on the first page. Since I am not allowed to change the LaTeX class for this document, are there any other packages I can use to add a footer?

Edit

Unfortunately, I cannot provide any MWE because the Latex class is proprietary and not available in the public domain.

Answer 1

If this is just the first page of the document then something like this should work:

\documentclass{article}
\usepackage{fancyhdr}
\usepackage{lipsum}

\pagestyle{fancy}

\fancypagestyle{firstpage}{%
  \fancyhead{}
  \renewcommand\headrule{}
  \fancyfoot[C]{First page footer}
}

\begin{document}
\thispagestyle{firstpage}
\lipsum
\end{document}

If you want it for the first page of each chapter, then use

\fancypagestyle{plain}{....}