Definition of passbooks:
(n) :
(banking) A customer's record of deposits and withdrawals from a savings account or current account at a bank, typically recorded in a small booklet. The bank keeps its own record, which is final in any dispute.
(n) :
(dated) A book that passes between a trader and a customer, used to record credit purchases.
(n) :
(South Africa, historical) A kind of internal passport used during apartheid to limit the movements of citizens outside of their homelands or designated areas.