Struck off companies are those companies which have not been filing their annual compliances for a couple of years or more. Such companies are therefore considered (by ROC) not to carrying on their business. Has your entity being struck off from the Register of Companies, you are at right place to take off your worries.
In 2016 over 1.63 lakh companies have not been carrying out business activities for long have been deregistered and a series of actions against such shell companies have been taken by ROC. These actions of government have caused a huge disturbance to the companies which were carrying on the business legally but have not done their statutory filings. Though the ROC must have served notices as mandated under Section 248 on the registered email ids of the Companies before striking them off, in many cases, there were complaints of not receiving any notice.