WHAT PRECAUTIONS CAN BE TAKEN RE PASSPORTS?

A parent, who suspects that the other parent may try and abduct their mutual child, can be vigilant regarding the issue or renewal of passports, especially if the child has dual nationality. Consulates of different countries operate different policies regarding this, and a worried parent should check these out for himself. A further precaution is to photocopy the relevant page of a child's passport, or the other parent's passport where the child appears, or make a note of the numbers.

It is sensible to keep up to date pictures of the children, and their heights and distinctive features in case of abduction, when descriptions are vital.
Preventing Abduction