Two Norwich MPs have urged their constituents to come forward if they have evidence against the collapsed social housing contractor Connaught.
The company's directors are facing an investigation by the Insolvency Service after the firm's failure.
MPs Chloe Smith and Simon Wright have also called for a local inquiry.
The termination of the contract between Connaught and Norwich City Council led to the loss of 300 jobs and delays in repairs to council tenant's homes.
Administrators KPMG will report to government ministers by 8 March on whether or not the conduct of Connaught's directors makes them unfit to manage companies in the future.
Business ministers Mark Prisk and Ed Davey said it was essential that any evidence of misconduct held by constituents should be brought to the administrators' attention.
Conservative MP for Norwich South Chloe Smith said: "People are still angry and aggrieved at how Connaught fell and took with it so many Norwich jobs.
"I urge ex-employees of Connaught and any local firms affected by the collapse now to give in any remaining evidence they may have."
The Liberal Democrat MP for Norwich South, Simon Wright, is also backing the call.
Mr Wright said: "There are still many questions that remain unanswered both by the city council and by Connaught.
"I would urge any individuals or creditors with concerns to write to myself or Chloe Smith as MPs, or to contact the administrators KPMG direct as soon as possible.
"The more evidence there is for the administrators, the more authoritative their report can be."