Hi Froggy, actually, this is very common and most buyers will be careful during the reno period since they are buying over the flat, then they wouldn't want to do any illegal reno in the flat etc and land themselves in trouble. The idemnity form covers the seller and if you have it in black and white, no big deal to let the buyer do early reno. I signed one last year so the buyers could move in during cny. The flat is vacant anyway so no big deal. To further cover yourself, you can also get a reno agreement from your property agent and get the buyer to sign it.