In the early 1960s, documents from the IRO Care and Maintenance program were placed in envelopes at the ITS and filed alphabetically by the last name of the family head. However, this made it more difficult to search for the other family members who were listed on the envelope by ITS employees as Begleitpersonen (accompanying people). Therefore, in an indexing project at the end of the 1960s, the names of the other family members were also indexed. Today, all of the names can be found directly in the database of the Arolsen Archives.