Does this sentence sound good already?

Question

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IN WITNESS WHEREOF, the parties have executed this lease agreement in duplicate with adequate stamps, with each having the same legal force.

Answer 1

IN WITNESS WHEREOF, the parties have executed this lease agreement in two copies, each stamped as required, and each copy having equal force in law.

Answer 2

Since you are obviously not an attorney, but someone trying to write like one, you should look up the statute and see what language is REQUIRED TO BE IN A LEASE AGREEMENT. Then maybe it won't get kicked back to you.