Teach your child his or her home phone number, how to make a collect call, how to call 911 for help and other possible life-saving information that every child should know. This could save your child's life one day or even help him upon being abducted by his own parent.
Know your rights concerning your child and his or her passport. Different countries have different laws. Some require both parents to sign the passport, whereas others allow only the dad. It pays to know your rights - and the law - no matter where you live.
Speak to an attorney about having a decree of sole custody issued, or a joint custody decree prohibiting the crossing of state lines - or from leaving the country - without your permission.
Contact the Department of State's Passport Lookout Program to find out if your child has been issued a passport. If so, there are steps you can begin taking to try and find the child.
Ask that the Department of State add your child's name into the State Department's Children's Passport Issuance Alert Program. You'll then be alerted should someone try to get a passport for your child.
Keep a record of information pertaining to your ex, like his or her social security number and relatives' phone numbers or addresses.