I have been working to get my family into the United States for over a year. My wife is Mexican and son was born there. My wife got her permanent resident visa just 2 months ago, and my son had his birth abroad certificate approved just a week ago.
Would there be any problems crossing with just my son's birth abroad certificate as evidence, if we cross as a family? We would have other proof that the child is ours, like Mexican birth certificate, hospital certificate etc. My son is 3 months old.