No. Plain postcards and correspondence cards are classified under 481720, but printed greeting cards — which carry a printed message or design as their primary feature — are classified in the printed matter chapter rather than here. The distinction turns on whether the article's primary character is as a correspondence medium or as a printed publication.

Envelopes originating in Mexico or Canada may qualify for preferential tariff treatment under USMCA, provided the goods meet the applicable rules of origin and are accompanied by a valid certification of origin. Importers should verify that the paper substrate and manufacturing steps satisfy the relevant tariff shift or regional value content requirements before claiming preference.