Posted by Dean on April 2, 2017, 4:07 pm Make sure you clean the chip before inserting into machine (wipe on shirt.). Was told this by one of the managers and never have issues with card at banamex! 430 Message Thread Chipped cards at banamex - Dean April 2, 2017, 4:07 pm Re: Chipped cards at banamex - Tim Edwards April 2, 2017, 7:40 pm « Back to index | View thread » Be sure to visit www.lamanzanilla.info for more information about La Manzanilla Mexico.