I won't be home on the day ( only early morning to let them in) because I'm starting a new job.. Would it be okay if I just gave them a set of keys to let themselves out with and lock the door and then just put keys back through the letterbox when they're leaving?
It's my new house so it's empty so don't have to worry about my belongings, I would ask someone but I only moved here 1 month ago and haven't had a chance to meet anyone yet..