Well thats a risk you take if your acting as a broker ?
Sami could make some sort of insurance for the broker to sign up to, but beside that, then its probally just like it is in the real world
If the lessee don't have money and is on the verge of BK, then returning leasing A/C is a win-win situation for both lessees and lessors. Lessors got their asset back safe and sound, and lessees got better chance of reorganizing their airlines
I've seen many airlines sign long term contract, and they got more than 3 fleets. They could have reduced their fleets number and might avoid BK, but they are stuck with the A/C as the termination fee is too much to bare