When does a confirmed request become a binding booking? Yen Oestreich January 25, 2019 10:28 Updated The booking is binding as soon as the tenant signs the rental agreement online and/or accepts the rental conditions. Related articles My apartment has been booked. What happens now? Where can I find the signed online rental agreement? What happens if a booking is cancelled? I want to meet the tenant before he moves in - is that possible? I have received several requests that overlap in time. What do I have to consider?