1)if you require the shop for personal use then you can file suit for eviction on said ground
2) ask the seller to furnish you copy of rent agreement entered into by him with the tenant
3) if the rent agreement is regsitered you can obtain copy from sub regsitrar office
4) teh rent act adopted by your state must be containing provision for increase in rent
5) in mahrashtra rent act provides that landlord will be entitled to increase the rent by 4%
per annum in respect of premises let for purposes of residence,
education, business, trade or storage