Del. Code Ann. tit. 6, § 2503H
(b) No retail store shall discriminate against a consumer paying with cash by treating that consumer differently in any manner from a consumer paying by a noncash method, including any of the following:
(2) Requiring consumers paying with cash to use automated machines that convert cash into prepaid cards. This paragraph does not apply to a food store or retail establishment that provides a device on premises that converts cash into a prepaid card that allows a consumer to complete a transaction at such food store or retail establishments so long as the device on premises does all of the following: