We recently have been told that our landlords are putting our property up for sale. We received an email 24 hours ahead of a realtor and possible buyer visit, but 8 hours ahead of time they asked that we come to unlock the door for them, as they were out of time. It was during during the workday, and while we don't work far from home, it is not at a time of day either of us were able to leave work. Can they require us to unlock the place for a viewing? The notice was fine, and we both agreed to the viewing without our presence (even cleaned for it). But since we couldn't leave work we had to leave keys to our place on the porch, which we are very uncomfortable with. Help! Is this legal?