It is reasonable to also consider the owner (a) said he was the original owner, (b) added the lanai, (c) was going into an assisted living facility. The Agent could have gone to the tax records but felt the owner was truthful. Once the new buyer found out someone did not tell the truth to just rip the contract up. No one was "making" them sign. Rather then walking away there is an attempt to bring consequences to the agent which may be unfair as they could be called out for not doing some additional investigation but no attempt to intentionally mislead. Key word being "intentional".
