If someone gifts you a large sum of money for a house deposit, I understand they need to give you a letter declaring this.
Do they do it at the point at which they transfer the money (as this is usually well before actually buying a house as it's all factored into mortgage offers/price ranges for house viewings etc)
OR
At the point at which you use that money to put down a deposit on a house you have picked (as this figure might be different i.e. You might keep 10K back for doing the house up etc)
Thanks in advance!