HRT could be set to close down officially after it did not feature on the FIAs provisional team entry list published on Saturday.
The team had been looking for a buyer after current owners Thesan Capital put HRT up for sale in early November.
There had been speculation after the team was put up for sale that it would not survive to be on the grid in 2013 and this now seems more than likely.
Current drivers Pedro de la Rosa and Narain Kartikeyan look likely to lose their seats as a consequence and staff at the team are expected to be released.
The deadline for 2013 team entries passed yesterday and 2013 now looks set to be a 22 car season.