Gift vouchers for stricken retailer Comet have been suspended, the chain's administrator said.
Deloitte, which was appointed yesterday, has launched an "urgent" search for a buyer to protect around 6,600 jobs at the 236-outlet chain.
The Comet stores will remain open and staff will continue to be paid in the meantime.
The collapse of Comet marks one of the biggest high street casualties since the demise of Woolworths in 2008 and comes a month after the failure of JJB Sports.
The large distribution hub in Harlow in Essex has become the biggest Comet site so far to close, with 172 people losing jobs.
Around 6,500 retail jobs are under threat as electricals chain Comet became the latest casualty on the high street.