Sports fans are due to find out whether they have managed to get Olympic tickets.
Fans may still have to wait until June 24 to find out for which events they have been allocated tickets, but money should have been charged to bank accounts.
It means that by the weekend people should have an idea whether they are going to the Games after the first round of ticket sales.
Some, who originally thought they had missed out, may have got lucky and gained a ticket that was reallocated from a "problem" account where the money could not be charged.
It is thought this could amount to tens of thousands of tickets. London 2012 has made three attempts to get payments from these accounts.
About half of the would-be buyers have managed to fix the card problems or top up funds in their accounts so they do not miss out on the chance of a ticket.
Outstanding orders have gone back into the system.
In total, 1.8 million people made 20 million bids for tickets to the London 2012 Olympics - but 6.6 million were on sale to the public.
Ballots were run on the oversubscribed events, which included the "must-see" men's 100m final, the opening and closing ceremonies and cycling events.
London 2012, which may be confident of already hitting £400 million of its £500 million target from ticket revenues, plans a first-come first-served sale of remaining tickets, with people who have missed out being at the head of the queue. Men's and women's football, handball, hockey and basketball are among the sports where tickets are still up for grabs.
