An extension of the period for which a book or other item is loaned by a library, usually by the length of the normal borrowing period. Renewal policies vary, but most libraries allow at least one renewal. To avoid fines, material must be renewed on or before the due date. Branches may prohibit renewals if another patron has placed a hold, so an item can get to the next person quickly. Particularly in academic libraries, borrowing periods may be quite long, but subject to recalls upon the request of another patron, effectively shortening the loan period.