Consult a family law attorney in your state or country
Gather evidence showing why sole custody is in the child’s best interests
Document abuse, neglect, substance abuse, domestic violence, or unsafe living conditions
Keep records of missed visits, poor communication, and parenting failures
Collect school, medical, police, and child welfare records if relevant
Follow all existing custody orders exactly
File a petition or motion requesting sole custody in family court
Request temporary emergency custody if the child is in immediate danger
Serve the other parent properly with all required court papers
Attend all hearings and bring organized evidence and witnesses
Show that you can provide a stable, safe, and consistent home
Demonstrate your involvement in the child’s schooling, health care, and daily care
Avoid negative behavior that could hurt your case, including violating orders or badmouthing the other parent
Comply with mediation, parenting classes, or evaluations if ordered by the court
Ask the court for a parenting plan that limits or supervises the other parent’s contact if needed
Follow the final custody order and keep documenting any violations