Background Verification In Accenture

Hi,
I got a critical situation don\'t know how to get out of this mess. Things happen, I worked in a company in 2011 which was very small company (hardly 10 or 14 people comapny) which was closed in year 2012. currently I received offer from Accenture, I have accepted it as well, but could not onboard because they say background verification is pending for that company. I have provided all the possible details such as offer letter of that company, relieving letter, and salary certicate. Since company has closed none of their landline number working neither email. What should I do now ?

After that company, I joined another IT firm and its been almost 2 years I have been working here. Recently accepted offer from accenture, but background verification is stuck at my past company. Do they verify and approve it.. because that company was there for sure no doubt. I wonder and little scared whether they will approve it or not. Please help

Dear Member... if your job onboard is tuck for background verification... Do not show that in ur resume... if its not going to effect ur salary package or position..