Ex Won't Give Me Child's Social Security Number: What to Do
Request the social security number from your ex in writing and keep a copy of the request.
If your ex still refuses to provide the number, consider seeking legal assistance from a family law attorney.
You may also be able to obtain the number through the court system by filing a motion to compel your ex to provide it.
If your child is receiving any government benefits, such as Social Security Disability Insurance, you can contact the Social Security Administration for assistance in obtaining the number.
Remember that obtaining your child's social security number is important for tax purposes, medical care, and other legal matters.