You can register a vehicle's lease in VertiGIS FM by selecting Leasing in the Ownership menu when you edit the vehicle's details.

Ownership Menu in Commercial Characteristics Tab
Selecting Leasing in the Ownership menu makes the Leasing section visible on the vehicle's details page.

Visible Leasing Section
You can specify the vehicle's lease in this section when you edit the vehicle's details and expand the Leasing section. Refer to Leasing for descriptions of the information fields in this section.

Entering Lease Details