The U.S. Treasury has taken significant action against three Mexican financial institutions, including CIBanco, Intercam, and Vector banks, by imposing sanctions due to their alleged connections to money laundering for drug cartels and aiding fentanyl trafficking. This move is part of a broader crackdown to disrupt financial networks supporting the fentanyl trade, which has been linked to the escalating opioid crisis. The sanctions prohibit U.S. financial institutions from conducting transactions with these Mexican banks, effectively cutting off their access to the U.S. financial system. As a result, these measures are expected to create hurdles for expatriates and limit the operations of other businesses connected to these institutions.