Exchange and commission rates vary considerably so it pays to
shop around and even bargain where necessary.. Commission is
sometimes charged for cashing travelers' cheques in foreign
currencies, but not for sterling travelers' cheques, provided you
cash the cheques at a bank affiliated to the issuing bank (get a
list when you buy your cheques). Commission is charged if you
change cash into another currency. You always need identification,
such as a passport, when exchanging travelers' cheques.