Del. Code Ann. tit. 6, § 3-312
(a) In this section:
(b) A claimant may assert a claim to the amount of a check by a communication to the obligated bank describing the check with reasonable certainty and requesting payment of the amount of the check, if (i) the claimant is the drawer or payee of a certified check or the remitter or payee of a cashier’s check or teller’s check, (ii) the communication contains or is accompanied by a declaration of loss of the claimant with respect to the check, (iii) the communication is received at a time and in a manner affording the bank a reasonable time to act on it before the check is paid, and (iv) the claimant provides reasonable identification if requested by the obligated bank. Delivery of a declaration of loss is a warranty of the truth of the statements made in the declaration. If a claim is asserted in compliance with this subsection, the following rules apply: