FIFA says about 1,400 people will have to change their tickets less than a week before the World Cup begins because they were handed out before work at the stadiums was completed.
FIFA said Saturday it notified 1,376 people whose tickets will have to be swapped because they do not correspond to valid seats.
Football's governing body said seating configurations changed after technical teams established exactly where the media tribunes and broadcast equipment had to be placed in each of the 12 venues.
FIFA said the changes were not caused by the delays in finishing Brazilian stadiums, and that such adjustments also happened in previous World Cups. It said the swaps account for "just a few cases comparing with the 2.2 million tickets sold to the general public."