Been in this EXACT situation... You haven't had any legal agreement drawn up to say they own a percentage or momentary amount of the property, so no, legally they dont own anything. The money was a gift, has been listed as so, and a gift is not something you benefit back from. If it were received as a loan/investment with stipulations, such as "the amount increases or decreases in line with the value of the property", the solicitors would have drawn up a contract for this, and all parties would have had to sign with witnesses etc. He's talking out of his arse. We had a similar situation with family gifting us money to purchase property, then after moving suggested some of it should have been a loan, and asked for an agreement to be drawn up so if we made money off the house, they'd get "their share". It worried me at the time, and they'd make remarks about how they "owned some of our house" used to drive me nuts, we never got an agreement drawn up, as far as I was concerned that should have been discussed pre move, and afterwards I didn't want it to affect our mortgage agreement, as it would look a bit dodgy to suddenly say someone else owns a % of our house. We moved last year, and made a nice profit on the old house, but needed every penny we made to be able to afford our new house. I was worried they might bring it up, but nothing was said, and hasn't since. I knew legally they wouldn't have been able to take any money from us, but obviously wouldn't want a big family falling out over money. My argument has always been, if the money was always meant to be a loan, we should have been told this from day one, and it may have influenced the sort of house we bought. We purposely bought a "doer upper" so we could make a profit and climb the ladder. If we'd have thought that selling and making a profit would have meant we owed a % of that money, we would have gone for a house that was already sorted or a new build, and stayed there long term. As I said, luckily for us, it hasn't been brought up since we moved again, so hoping they've just written it off and it won't get brought up in the future. Sounds like your family member is just using it as a bragging sort of talk "I have investments in property" type of crap. Just ignore it. Legally nothing they can do, and if they do want to cause family drama over it, I'd offer to pay it back at £5 a month, or some measley sum that will never actually pay the loan off, and say that's all we can afford. Congrats on your new home. X