Buyer received a letter in her mail on January 1 offering to sell Buyer 5,000 widgets for $20 apiece. Seller’s letter closed with the following statement: “I know that this offer is so attractive that I will assume that you accept it unless I hear otherwise by January 31.” Buyer did not reply. Seller shipped the widgets on February 1.

What are Buyer’s responsibilities under the CISG?

Modification of Contract and Reliance Under the CISG nju4