ICRC - International Committee of the Red Cross

The International Committee of the Red Cross or the ICRC helps people around the world to restore and maintain contact with family members through Red Cross messages. This service is provided when the loss of contact is due to an armed conflict, a situation of violence, a natural or man-made catastrophe, migration; and when other means of communication (telephones, postal service, etc.) do not work or do not exist; or, as far as possible, in another situation where help for humanitarian reasons is needed.

You can find more information here: https://www.icrc.org/