Pennsylvania Statutes Title 73 P.S. Trade and Commerce § 204-4. Reasonable security authorized; excessive security prohibited

(a) Demand for security.--A person may, prior to providing property or services to an individual who does not possess a credit card, demand and receive reasonable security from the individual to secure payment for the property or services requested. Reasonable security may take the form of a payment in cash on account reasonably related to the value of the property or services to be provided or any other appropriate assurance.

(b) Excessive security prohibited.--Demanding or receiving an unreasonable or excessive amount of security is unlawful.