[EuroPython 2023 — North Hall on 2023-07-21] https://ep2023.europython.eu/session/fighting-money-laundering-with-python-and-open-source-software In this talk proposal, we will discuss how to detect the chain of fraudulent transactions and help the investigation agencies by providing useful insights to fight money laundering with the help of Python programming language and packages. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License http://creativecommons.org/licenses/by-nc-sa/4.0/