The collections of books and periodicals of the 19th, 20th and 21st centuries, as well as the collections available in the form of microfilms and digital copies, may be used by any adult after registration and obtaining a library card.
The special collections (manuscripts, early printed books, graphics, cartography, numismatics) may be used only by persons who have a valid library card and can prove the need to use a particular collection (e.g. a letter of recommendation from a supervisor, a university academic staff card, the consent of the Director of the National Ossolinski Institute, or are retired academics). The decision to grant access to special collections is taken by the head of the relevant division.