"Notice to Buyer.
Do not sign this contract in blank.
You are entitled to an exact copy of the contract you sign.
Keep it to protect your legal rights."
Provided, That in lieu of the word "Buyer" there may be substituted either of the words "Lessee" or "Mortgagor" and in lieu of the word "contract" there may be substituted either of the words "lease" or "mortgage."
69 P.S. § 613