We had offered him offer letter earlier, which he accepted and was supposed to join on 19th, then again we sent him a revised offer letter and he joined on 26th September. So his intention was to deceive us and we were deceived. And he also did this fraudulently, but ultimately he joined on the mutually agreed date.
Can we file an IPC 420 or IPC 415 against him?
Your organisation should have conducted pre-employment background screening verification of new candidates.
If your organization does not have a formal process for the same, then the verification can be done by internal sources or can be outsourced, depending on the requirements of the organization.
A background screening process establishes the true identity of the person and verifies the information provided in the resume. The process enables the organization to minimize the risk of frauds, thefts, industrial espionage, operation disruptions, property destruction, reputation damage. Most importantly it facilitates the organization in providing a safe and secure work environment.
Your organization failed to do this background verification but blindly accepted his request for employment and offered him employment.
Such a person with doubtful integrity could not have been tolerated in the system even for a moment, hence as per the employment offer letter and the conditions stated therein you can terminate his employment without assigning any reason or without paying him the notice period due to the fact that he suppressed facts essential for his employment.