Tenant lost keys but request landlord to pay for new locks..

[Doris Jin Huang]

Our tenant lost a set of the keys but asked us to pay to change all locks. They argued it's landlord's responsibility to keep them safe, although it's their fault to lose the keys in the first place. The property is located in Bronx, NY. It's obvious to us that tenant should be responsible for the cost of new locks in this case, but wanted to know if there's any laws supporting this?

Thanks very much.