Del. Code tit. 5 § 942
Any bank may, subject to any limitations on lending authorities contained in its charter or otherwise imposed by law and subject to the other provisions of this subchapter, offer and extend credit under a revolving credit plan to a borrower and in connection therewith may charge and collect periodic interest, interest charges and other charges permitted by this subchapter and may take such security as collateral in connection therewith as may be acceptable to the bank. Without limitation of the foregoing, credit may be extended under a revolving credit plan by a bank's acquisition of obligations arising out of the honoring by a merchant, a bank or other financial institution (whether chartered or organized under the laws of this or any other state, the District of Columbia, the United States or any district, territory or possession of the United States, or any foreign country), or a government or governmental subdivision or agency of a credit device made available to a borrower under a plan, whether directly or indirectly by means of telephone, point of sale terminal, automated teller machine or other electronic or similar device or through the mails.
5 Del. C. § 942