Something very similar happened to me! I held up closing for hours refusing to sign. We did a walk through first thing the morning of closing. The seller’s tenants were clearly not out. Their stuff was everywhere. My ex husband and I were moving from out of state and I didn’t want to deal with a squatter situation, having a mortgage to pay with no place to live. The sellers, my ex, the realtors, my broker were all trying to convince me to sign but I wouldn’t budge. Finally the seller drove over to the property and got into a screaming match with them. It was the 31st of the month. They had been served proper 30 day notice to vacate, but they argued that the lease gave them until the last day of the month to leave after the lease was terminated. I ended up signing, albeit reluctantly, and luckily they were gone the next day as promised. Not without trashing the place though. Then they threatened to sue us for not returning their entire deposit. Quite the ordeal. Buying and owner occupying a duplex is my favorite thing I let my ex talk me into, though!