Is there a way to NOT inherit tenants?

[Michael Lee]

Hello -- I'm considering making an offer on a duplex with both units currently rented. I'd prefer not to inherit the tenants as I want to make some improvements, raise the rent, and put my own tenants in. What is the best approach to this other than writing it in the contract that the property be vacant at closing? Also, in general from the seller's perspective, what is the obligation to tenants who have a signed lease but you're wanting to sell the property? Thanks!