signpdf.tex

\documentclass[a4paper]{article} % a4paper (A4), letterpaper (US Letter), or whatever

% For overlaying signature image on a PDF
% Note: Starting in v1.1, pdfoverlay replaces deprecated \c_zero by \c_zero_int. Update your TeX
% distribution or use pdfoverlay v1.0 (https://git.io/JfnPb) if you encounter relevant error message.
\usepackage{pdfoverlay}

% For placing boxes at desired positions on the page
\usepackage[absolute,overlay]{textpos}
% Each module is 1cm wide and 1cm high and start everything at the top-left corner
\setlength{\TPHorizModule}{1cm}
\setlength{\TPVertModule}{\TPHorizModule}
\textblockorigin{0cm}{0cm}

\pagestyle{empty}


% NOTE: Uncomment this package to draw a horizontal and a vertical ruler on the page at absolute
% position, so that it is easier to work out the coordinates where you want to insert a signature.
% Comment out this package to create a clean signed PDF file after inserting your signature as desired.
%\usepackage{fgruler}

\begin{document}

% Specify the PDF file for signature
% NOTE: To avoid losing existing PDF annotations/markups, please flatten your PDF file first.
% Linux/macOS user: Use `pdftocairo` tool and run: pdftocairo -pdf input.pdf output.pdf
% Windows user: Print the PDF file using a PDF printer e.g. Adobe and choose to include the markups.
\pdfoverlaySetPDF{example.pdf}

% Sign on the first page
% Use `textblock` to state where the signature is to be placed.
% E.g., this block (signature) is 3 modules wide (i.e., 3cm), and the center ([0.5,0.5]) of the block
% is positioned at (5cm,24cm) relative to top-left corner of the page (move right, move down).
% Note: Use `fgruler` package above to help you work out the coordinates efficiently.
\begin{textblock}{3}[0.5,0.5](5,24)
\includegraphics[width=3cm]{signature/zhangsan.pdf}
\end{textblock}

% Add date with textblock or any PDF annotation tool you like.
\begin{textblock}{3}[0.5,0.5](15,24)
\today
\end{textblock}

%Output all pages in the PDF file up until the specified page number
\pdfoverlayIncludeToPage{2}

% Sign on page 2
\begin{textblock}{3}[0.5,0.5](11.5,22.5)
\includegraphics[width=3cm]{signature/johnsmith.pdf}
\end{textblock}

% Put multiple signatures on one page
\begin{textblock}{2}[0.5,0.5](11.5,24.5)
\includegraphics[width=2cm]{signature/lisi.pdf}
\end{textblock}

% Output all remaining pages in the PDF file
\pdfoverlayIncludeToLastPage

% Sign on the last page
\begin{textblock}{3}[0.5,0.5](5,24)
\includegraphics[width=3cm]{signature/signature.pdf}
\end{textblock}

\end{document}