The lessor who is responsible for an asset often worth tens or hundreds of millions of US dollars will want to keep a keen eye on their asset. Not only is the asset protected by a lease agreement detailing multiple conditions to be met at aircraft return and conditions throughout the lease, but there will also be clauses that might allow an aircraft to be taken back in extreme circumstances.
It is therefore very important to maintain frequent and regular communication with the lessee not only to manage the relationship, but also to maintain oversight of the asset.