hi i purchased a used maruti wagon r 2008 model and used it

hi i purchased a used maruti wagon r 2008 model and used it for an year.While giving servicing the guys informed that the chassis no is missing which will be near the engine .I s there anyway i can get a new chassis plate or can i find the chassis no somewhere else .Since i need to resell the car they said it is very important.Kindly advice on what to do .I do have all original documents with me .Thank you