diff --git a/report_thesis/src/_preamble.tex b/report_thesis/src/_preamble.tex
index ab4080b5..31d32af5 100644
--- a/report_thesis/src/_preamble.tex
+++ b/report_thesis/src/_preamble.tex
@@ -20,6 +20,7 @@
 \usepackage{enumitem}
 \usepackage{hyperref}
 \usepackage{placeins}
+\usepackage{pdfpages}
 
 \renewcommand{\topfraction}{.85}
 \renewcommand{\bottomfraction}{.7}
diff --git a/report_thesis/src/sections/PyHAT_contribution_letter.pdf b/report_thesis/src/sections/PyHAT_contribution_letter.pdf
new file mode 100644
index 00000000..001bd92d
Binary files /dev/null and b/report_thesis/src/sections/PyHAT_contribution_letter.pdf differ
diff --git a/report_thesis/src/sections/appendix/index.tex b/report_thesis/src/sections/appendix/index.tex
index 2bb14ff5..17b139f3 100644
--- a/report_thesis/src/sections/appendix/index.tex
+++ b/report_thesis/src/sections/appendix/index.tex
@@ -232,3 +232,11 @@ \subsection{Overview of best performing model configurations}\label{subsec:best_
 \input{sections/appendix/tables/CaO_overview.tex}
 \input{sections/appendix/tables/Na2O_overview.tex}
 \input{sections/appendix/tables/K2O_overview.tex}
+
+\FloatBarrier
+
+\subsection{PyHAT contribution certificate}\label{subsec:pyhat_contribution}
+\begin{figure}
+    \centering
+    \includepdf[pages=-, pagecommand={}, width=\textwidth]{sections/PyHAT_contribution_letter.pdf}
+\end{figure}
\ No newline at end of file
diff --git a/report_thesis/src/sections/pyhat_contribution.tex b/report_thesis/src/sections/pyhat_contribution.tex
index 6ba44200..d75a6228 100644
--- a/report_thesis/src/sections/pyhat_contribution.tex
+++ b/report_thesis/src/sections/pyhat_contribution.tex
@@ -1,6 +1,7 @@
 \section{PyHAT Contribution}\label{sec:pyhat_contribution}
 As part of our work, we have made several contributions to \gls{pyhat}.
 We describe these contributions here.
+
 \gls{pyhat} offers a user-friendly interface designed for performing machine learning and data analysis tasks specifically for hyperspectral data.
 Our collaboration was initiated through a series of discussions with two members from \gls{usgs} that are responsible for \gls{pyhat}, wherein we identified mutual challenges and opportunities for integrating our solutions into the tool.
 
@@ -27,3 +28,7 @@ \section{PyHAT Contribution}\label{sec:pyhat_contribution}
 
 Finally, we made some contributions to improve the performance of various processes in \gls{pyhat}.
 At the time of writing, all contributions have been demonstrated to work as intended to the two \gls{usgs} members responsible for managing \gls{pyhat} and are undergoing final review.
+
+In recognition of our efforts, we received a formal letter of acknowledgment from the \gls{usgs}.
+This letter acknowledges our contributions to \gls{pyhat} and highlights the positive impact our work has had on enhancing the tool's functionality and the field of chemometrics.
+The acknowledgment letter is presented in Appendix~\ref{subsec:pyhat_contribution}.
\ No newline at end of file