(1)  Unless  otherwise  agreed tender of payment is a condition to the
seller's duty to tender and complete any delivery.
  (2) Tender of payment is sufficient when made by any means or  in  any
manner  current  in  the  ordinary  course of business unless the seller
demands payment  in  legal  tender  and  gives  any  extension  of  time
reasonably necessary to procure it.
  (3)  Subject  to  the  provisions  of  this  Act  on  the effect of an
instrument on an  obligation  (Section  3--802),  payment  by  check  is
conditional  and  is  defeated as between the parties by dishonor of the
check on due presentment.
Structure New York Laws
2-501 - Insurable Interest in Goods; Manner of Identification of Goods.
2-502 - Buyer's Right to Goods on Seller's Repudiation, Failure to Deliever, or Insolvency.
2-503 - Manner of Seller's Tender of Delivery.
2-505 - Seller's Shipment Under Reservation.
2-506 - Rights of Financing Agency.
2-507 - Effect of Seller's Tender; Delivery on Condition.
2-508 - Cure by Seller of Improper Tender or Delivery; Replacement.
2-509 - Risk of Loss in the Absence of Breach.
2-510 - Effect of Breach on Risk of Loss.
2-511 - Tender of Payment by Buyer; Payment by Check.
2-512 - Payment by Buyer Before Inspection.
2-513 - Buyer's Right to Inspection of Goods.
2-514 - When Documents Deliverable on Acceptance; When on Payment.