Lease Option or "Subject to" Property

[Lee Mankin]

Hello,

I have a potential deal where the owner is open to a lease option or allowing me to purchase the property subject to the existing financing. We are both concerned about triggering the due on sale clause with either of these options. Consequently, I am considering whether or not to record the lease option (if I go that route). In either option, What the various methods people use to protect themselves from the owner taking out additional financing on the property during the lease option period or if the sale is made subject to the existing financing?

Thank you,

Paul