I am filling out my n400 form for the USCIS I just noticed that my last name is misspelled on my Resident Card it should be Contreras and it appears as Contreres. Would I need to send a copy of my birth certificate?
No, just make sure that you have the correct spelling on your N-400 application. You could rectify the issue the day of your interview.
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Law Office of Luis A. Guerra (954) 434-5800. This answer is of a general nature and should not be relied upon as final, nor is it intended as legal advice.
I usually recommend to send a copy of your birth certificate with its translation. It is not mandatory, however if the officer reviewing your case needs it she will have it at hand. I strongly recommend for your to bring the original for your interview.