If an American citizen has a baby in Mexico is it true that she can pass her baby by land at a border before the baby is 2 years old without obtaining a US birth certificate from an Embassy first?

Mollie, what are you doing asking questions like that? Does your mum know? No. that is not true. You have to register the baby at the embassy in order for the child to derive citizenship. The Immigration Inspector at the port of entry is not going to allow you to enter the U.S. without proof of the child's status. Think about it..... trafficking the port of entry?