Quick Q - acquired property with tenant whose lease ends in 2wks

[Stephanie M.]

Hi all, quick question for you.. 

I closed on a duplex on 7/13. Current tenant’s lease expires on 7/31. I met with tenant same day as closing - to give application and let him know of two rent options if he applies, he can pick from asked him to let me know by the 17th. Tried to contact him via text asking his decision on the 17th- no response. Called him and left a voicemail 7/20- no response. Text 7/21 saying we haven’t heard from him, and gave notice of 24 hrs of entry to take pictures to list for rent. He calls back screaming. Long story short - lease expires 7/31 we tried to work with him. Discussed that we will not be renewing and recorded the conversation. Gave him until 8/8.  Do we need a letter of non renewal if his lease expires? State of Wisconsin. Thanks for any guidance here.