(a) A party may decline a tender of performance made before it is due except where acceptance of the tender would not unreasonably prejudice its interests.
(b) A party's acceptance of early performance does not affect the time fixed for the performance of its own obligation.
International Legislation
Fontaine, Marcel, OHADA Uniform Act On Contract Law Preliminary DraftModel Laws
Principles of Latin American Contract Law (PLACL)The Draft Civil Code for Israel in: Siehr, Kurt/Zimmermann, Reinhard (ed.) The Draft Civil Code for Israel in comparative perspective, 2008National Legislation
Japanese Civil Code 2020Principles / Restatements
OHADAC principles on international commercial contractsPrinciples of European Contract Law - PECLDelivery times are dependent upon prompt receipt by the Seller of all Purchaser-furnished material, information and approvals, if any, necessary to proceed with work without interruption. Early deliveries are permitted. However, if the Seller is aware of the likelihood of early deliver it shall provide {X} days of notice by electronic mail or fax prior to the shipment - (International Contracting: Law and Practice - Larry A. DiMatteo - 3.05 - S. 63).
Prepayment of the principal and all accrued interest on this Note shall be allowed with the consent of Holder, and any such prepayment shall be applied first to interest accrued but unpaid to such date on the outstanding principal balance hereof immediately preceding such prepayment and then to reduction of the principal balance hereof.
(...) Unless Purchaser has authorized advance shipment in writing, Purchaser may store at Seller's expense, or return, shipping charges collect, all goods received in avance of the scheduled delivery date - (International Contracting: Law and Practice - Larry A. DiMatteo - 6.05 (A) - S. 208).