court is exactly where it would end up if a tenant or two refuse to supply a copy of their lease if the LL wanted them to move out or raise the rent and didn't get those lease copies at the time of sale, tenant claims Lease let them have dog / cat and since fluffy died 3 months ago they finally found a replacement fluffette. LL has no proof otherwise and again legal action is what would settle it since a judge would want to see the lease copy that says tenant can have a pet. Until a judge sees a tenant copy of a lease and says to the LL this lease says you cant do XYZ then how is a Ll with out lease copies supposed to deal with it? especially if a tenant is non compliant ?
Legal action should not be mentioned to the tenants unless or until the landlord fails to get the lease information from the seller of the property - and then ONLY as a last resort. The landlord should take the seller to court before taking any tenant to court.
If the leases are on the seller’s computer, it should be easy to transfer the file.