10.9. Documented migrants are those who satisfy all the legal requirements to enter, stay and, if applicable, hold employment in the country of destination. In some countries, many documented migrants have, over time, acquired the right to long-term residence. In such cases, the integration of documented migrants into the host society is generally desirable, and for that purpose it is important to extend to them the same social, economic and legal rights as those enjoyed by citizens, in accordance with national legislation. The family reunification of documented migrants is an important factor in international migration. It is also important to protect documented migrants and their families from racism, ethnocentrism and xenophobia, and to respect their physical integrity, dignity, religious beliefs and cultural values. Documented migration is generally beneficial to the host country, since migrants are in general concentrated in the most productive ages and have skills needed by the receiving country, and their admission is congruent with the policies of the Government. The remittances of documented migrants to their countries of origin often constitute a very important source of foreign exchange and are instrumental in improving the well-being of relatives left behind.