A common foreign client is simultaneously in discussion with Company A and Company B in India. The so called client states that Company B product is a copy of Company A's product during the demo session of Company A. The only loop the client had was that Company A employee who presented the demo of Company B's product a week before.
Actually the said employee had already quit from company A but the company A's website had the photo & details of former employee who is now associated with Company B. The so called client takes demo with Company B and later finds ex employee's details in Company A's website and told the company A that their employee had given demo of Company A's product under the domain name of Company B.
In this case, except the demo session the client didn't have access to live application of Company B but he is very much confident about his allegation.
In this case, except the demo session the client didn't have access to live application of Company B's product, the so called client didn't state its similar or identical but very confident that Company B's product is the copy of Company A's product.
What action can Company B take against the foreign client if they're innocent.