Why archives cannot put every record online

Why do archives not digitise their entire collections and put every record online?

Digitisation is expensive, and some records remain restricted under rules that require an archive to verify the identity of the person consulting them.

Digitising a large archive costs substantial amounts of money. Access rules create a separate limit because some records remain restricted rather than open to every reader. An in-person archive can check a reader card and verify who is consulting those materials. Complete online access therefore depends on both resources and the legal or administrative status of each collection.