After discovering the online trade in tickets, organisers have now written to everyone who purchased seats to inform them tickets can only be collected by the person named on the credit card used for purchase.
Event director Maggie Crowe said: 'All of the artists who perform at the BRIT Awards do so for free because the show is a charity fundraiser. The terms and conditions for the ticket offer explicitly point out that tickets are non-transferable.
'We think it is unfair on the artists, unfair on the charity and unfair on music fans for touts to exploit the event in this way.' Around 2,500 tickets for the BRITs were put on sale last month, costing £65 each, and sold out within an hour.
But within 24 hours more than 200 pairs of tickets to the prestigious event were on sale on internet auction site eBay for up to £400 per seat.
It is expected the BRIT Awards 2007 will raise £1 million for charity, bringing the total raised by the event since 1992 to £8 million.
The main beneficiaries of the BRIT Trust charity are the BRIT School for the Performing Arts and Technology, in south London - the UK's only non-fee paying school for the performing arts - and Nordoff-Robbins Music Therapy.
Among the acts confirmed to be performing at next week's ceremony are Take That, the Scissor Sisters and Amy Winehouse.
Oasis - who are to receive the Outstanding Contribution To Music prize - will close the event with a selection of their classic hits.