Child born in Mexico to Dual US/Mexico father

[Ben & Katy 168]

Good evening,

 

I have a question on how to pursue this. 
 

My niece (through marriage to my Mexican wife) was born in Mexico to a dual citizen father (US & Mexico citizenship) and a Mexican mother out of wedlock.  
 

Throughout her life she has received a lot of conflicting advice on this subject.  When she was around 3-4 years old American father abandoned her, her baby brother and mom in Mexico.  She hasn’t had contact with him since that day they were abandoned. 
 

He did all he could to avoid paying child support and avoided letting her get citizenship through birth so she could go after him for support while she was a minor.  His family paid off judges in Mexico so he wouldn’t have to pay support.  He also refused to recognize himself of the father of her younger brother. 

 

Niece is 22 years old now and is interested in obtaining her citizenship through birth of American father.

 

She has her own Mexican birth certificate with the American father’s name on it.  Since he is a dual citizen he had himself listed as “Mexican” on the BC.  
 

She also has her fathers BC from Mexico but not the father’s consular birth abroad certificate. 
 

We can’t seem to get any direct information from the US Government on the first step.  
 

Her father did live at least 5 years in the USA and 2 years after age of 14 to fulfill that requirement.  The only thing would be acquiring evidence from a father that won’t cooperate.  
 

Would this be an N-600 filing? Or something completely different with her local consulate in Hermosillo?  I wrote to the consulate over there but haven’t got a response yet.
 

 

[nelmagriffin 150]

REFERENCE: 

I am the Child of a U.S. Citizen | USCIS

[Mike E 11,741]

29 minutes ago, Ben & Katy said:

When she was around 3-4 years old American father abandoned her, her baby brother and mom in Mexico

Prior to age 3, did he, in writing,

* acknowledge her as his daughter

* agree to provide her financial support

?

[Boiler 45,715]

https://nl.usembassy.gov/u-s-citizen-services/child-family-matters/claiming-citizenship-born-outside-united-states/

 

I do not see how it is practical without the Fathers help.

[Mike E 11,741]

Any cooperation from the father now is moot given his daughter is over age 18, and apparently never legitimated. 

[nastra30 2,293]

7 hours ago, Ben & Katy said:

 

Her father did live at least 5 years in the USA and 2 years after age of 14 to fulfill that requirement.  The only thing would be acquiring evidence from a father that won’t cooperate.  - If it's CRBA she's after here  she doesn't qualify anymore as she's 18+ years old.
 

Would this be an N-600 filing? Or something completely different with her local consulate in Hermosillo?  I wrote to the consulate over there but haven’t got a response yet. - doesn't qualify for N600 or N600k. Again, she's 18+ years old.