As long as you have the receipts I doubt it will cause a problem MrsV. We eventually had sets of keys all over the place - two of her neighbours had keys (which they never gave her, they would just let her in and keep the keys), the care agency had a set, there was a set in the key safe and my mother had her own set. Lost keys are a common feature! Definitely get a key safe if you don't already have one. The council provided it free for my mother even though she was self funding.