Has two or more nationalities who is a child of a Mexican citizen born abroad; also who is born in national territory and his mother or father (or both) are foreigners.
Whether or not you have dual nationality depends on the laws of the other country involved. It may be that the other country considers you it’s national even if you do not accept nationality. In addition, in some countries, the laws prohibit the renunciation of nationality under any circumstances or require a formal act of resignation.
Having dual or multiple nationalities can bring some benefits such as employment opportunities, the right to access social benefits (such as education, medical care, pensions), property rights and unrestricted residence rights.
Since 1998, the Nationality Law of Mexico allows Mexican people to have another nationality in addition to Mexican nationality. This fact has great relevance because, in effect, the double (or multiple) nationalities implies an extension of rights for the person who has it. However, there are also responsibilities that arise from having more than one nationality, which is important to know.
If I have another nationality besides the Mexican one and I go abroad, is there anything I should do?
Therefore, if you have another nationality, in addition to the Mexican one, and you intend to travel to the country of which you are also a national, it is advisable to contact the embassy or consulate of that country closest to your home in Mexico, to know your rights and obligations. Remember that while you are in the country of your other nationality, the Mexican government can not provide you with consular protection and you will be treated as a national of that country.
In addition, it is important to be aware that having more than one passport can result in more stringent security checks by immigration authorities when crossing borders.