It is aimed at the following members of the UB community, with the following conditions: 

Users can request documents online or in situ, at the library where they are held. To use this service, you must:

 Be registered in the database of users of the CRAI loan service.

 Have no overdue items.

 Not be temporarily blocked from using the loans service as a penalization for a late return or other problem.

PUC online

Authorized UB users can request documents from other institutions in the CSUC directly through Cercabib, selecting the CCUC/PUC option from the search box drop-down and previously identified.

PUC in situ

Authorized UB users can borrow items directly from any of the libraries in the CSUC. They must use their UB Card to identify themselves and can then take out documents on loan.