Immigration Law Questions? Ask an Immigration Lawyer.
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Under Mexican immigration law, for a Mexican permanent resident visa there is no mandatory prohibition against issuing it to you as long as your probation is completed. So, you have a right to appeal any denial of your permanent resident status in Mexico and based on your prior felony. I do not of course know why they are denying you and we cannot find that out through this site but if you hire an immigration attorney in Mexico they can find out and pursue your appeal for you.