Thank you everyone for your valuable comments and suggestions. Dear Mr. V. Rangarajan, thank you for your support and help. I have not disclosed my real name and other details as I think this is a violation of terms here for this site, but I would definitely like to ask for your personal/official ID so that I can approach you directly.
Further to your comments, I would like to say that I admit I did not have a good rapport with my manager. However, my point remains the same that he was not the only manager I reported to in that organization. Prior to his joining, I reported to two different managers who are in the top-level management. Moreover, I want to mention that my performance was good as I was the 2nd best in my particular department. I can assure anyone that during my time with that organization, there were never any disciplinary issues, no financial issues, and I always helped the clients. Therefore, I disagree with the points you mentioned regarding inappropriate financial dealings, dishonest practices, acts of connivance, and misconduct.
Also, I have worked with three more organizations, so why should one particular issue, which is not even professional, hamper anyone's career? I understand how background checks are conducted, but why don't companies perform these checks before an employee joins, especially since they collect all scanned documents well in advance? This would prevent situations like mine, where I resigned from my previous organization as soon as I received the offer letter, only to be terminated due to a background check. Now, I cannot ask my previous organization to rehire me. It is a serious problem, in my opinion, and it seems unfair that even if an employee is genuine, they may not be hired due to the company's strict background checks.
I also want to share that the HR informed me that they have been working with the background check company for the last 10 years and they cannot be wrong. However, in my case, it was clear that they made a mistake by misrepresenting the situation.
Dear Seniors, I have one request for all of you. When I was terminated, I was not given any letter (hard copy or anything); I received a system-generated email stating that I was terminated. Offer letters usually require a signature and need to be returned to the company, so how valid is this type of termination where no valid reason was provided to me in writing?
I appreciate any help or advice you can offer in this situation. Thank you.