London (CNN) -- Unwanted tickets for the 2012 Summer Olympics can be sold back starting Friday, organizers said Thursday.
Those who have already bought tickets directly from organizers will be able to sell unwanted seats for full face value.
Some of the tickets were sold more than a year before the events and may no longer be wanted.
"The resale process will allow those who are no longer able to attend or no longer want their tickets to sell them to other sports fans and help ensure that venues are full at Games time," the London Organizing Committee (LOCOG) said in a news release.
LOGOC hopes to cut down on unwanted tickets being sold through third parties or illegally at inflation prices.
The tickets will not become immediately available, however. The tickets indicated for resale will go into a pot and be released at a later date.
Tickets already bought through authorized third parties are not eligible to be resold through LOCOG's website.
Ticket allocation has been one of the few problems facing organizers. Complaints poured in after many people said they had missed out on tickets to top-tier events during the early rounds of sales opened to British residents.
Also, on Wednesday organizers admitted "human error" last year led to 3,000 people being sold 10,000 tickets to synchronized swimming events that simply did not exist. It said it discovered the mistake after comparing final seating configurations with the number of tickets sold for the events.
Over the Christmas period, those people were contacted by mail and automated phone messages to give them the opportunity to get tickets to other top-tier events as compensation, at no extra cost.
Local media have reported that some of those allocated only synchronized swimming tickets will be now be in the stadium for the finals of some of the main track events, at a fraction of the face value of those seats.