The 1980 Hague Convention is an agreement between certain countries which aims to ensure the return of an abducted child to the country where he or she normally lives.
All cases that come under the Hague Convention are dealt with by the Central Authorities in the UK.
To find out which countries are part of this Convention, visit the Hague Conference Website.
If a child has been taken to a country that has not signed the Hague Convention parents may need to apply for custody and permission to bring their child back to the UK through the courts of that country.
More top news
A missile launched by North Korea has landed in the Sea of Japan, according to the Japanese Government.
A band of thundery rain moves northwards overnight.
The German chancellor warned the times in which the EU "can fully count on others are somewhat over" in the face of US divisions and Brexit.