Oh, I experienced the “improved” law.
Used to be, if she writes your name down, and so many years pass (like 4), you are the father and can’t contest it, no matter what.
Now, you “just” have to be able to pay the legal and DNA bills to prove you are not the father. (And child support during the pendency of the case.)
All it takes to get the process started is the accusation.
No evidence needed.
To my knowledge, this is the same law in all 50 states, due to some sort of uniform law.
And here’s that law: Title IV-D
My son’s ex’s lawyer knew she’d never see a penny from her client when the judge ruled that they each had to pay their own lawyers. Somehow the lawyer filed a judgment against my son for her fees. He had no idea.
I convinced him to buy a house and when they looked into his credit he was denied because of that judgment. My son took it to court and the lawyer acted like it had been a mistake. The judge was angry at the lawyer and gave her a lecture but he should have put her in jail.
This was 2 years after the divorce and if it had gone 3 years he wouldn’t have been able to challenge it. The amount had almost doubled because of the interest and penalties. I believe she was waiting for the 3 years to be up and then take him to court for lack of payment.