No. That is why you read the contract before you sign it to see of there is a cancellation clause.

It means 72 hours not business hours ;)

No. The mortgage is a lien. The mortgagee clause generally refers to a provision in the homeowner's insurance policy providing that loss to mortgaged property is payable to the mortgagee named in the policy and promises advance written notice to the mortgagee of policy cancellation.

The cancellation made everyone late for work.

The clairvoyant did not predict the cancellation of his show.

Usually rental agreement has a cancellation clause that sets the term under which the rental agreement can be cancelled. It is common for them to require 30 days notice before vacating.