DOES IT MATTER WHICH COUNTRIES ARE INVOLVED?
Yes. If both countries involved are parties to The Hague Convention on Civil Aspects of International Child Abduction 1980, and it is in force between them, then the legal action to be taken will be according to the Convention. If one or both of the countries is not a party to the Convention, then proceedings will have to be taken under the law of the country where the child is now located. In Israel this would be an application for an order for Habeas Corpus and to use other wide-ranging powers and the discretion the court has to return the children, taking into consideration any relevant findings or orders from the foreign court.