Fake documents are easy to get, this ad in Craigslist show how real the fake documents look. You need to do due diligence and check any documents presented to you if you want to avoid troubles, the site used to check IFEs http://listanominal.ife.org.mx/consulta_permanente_ln.htm
Banks and notaries check it and moreso now with so much fraud and anti money laundering, you should check any IFE voting credential presented to you as you see the fakes look like the real thing, just wont pass the online verification test which you now know.