regular civil suit n alternate

Sirs, I am approached by a client who has filed regular civil suit pertaining to her room which is tresspassed. My clients father had purchased a room in chawl in 1985 and had availed loan for the same. The room was subsequently given to a person to reside on an oral agreement. In 2007 my clients father expired. The bank deducted the remaining semi from his pf n the remaining amount along with the room papers that is deed of confirmation n sale agreement were handed over by the bank to my client. My client after receiving the papers went to the see the room where she came across this tenant who was staying there. She requested him to vacate the room for her own accomodation. The tenant agreed n requested 15days for his arrangements for alternate accomodation. After lapse of 15-20 days when my client approached him he denied to vacate n alleged that he is the owner of the said room. My client filed regular civil suit pertaining to the said room in 2011 n the matter has come to me at this juncture. My question goes like this -that since there is lapse of time is there provision favouring my client to waive the time bar -the tresspasser has not produced any document till date favourin him This is my first civil suit and I need little guidance from the seniors.