Short answer
A "replica Hermès Sac à Dépêches 18" is a counterfeit. Hermès does not make a replica of anything, and the company does not use the word in product names. The Sac à Dépêches is an Hermès briefcase sold in sizes stated in centimeters. The "18" in these listing titles comes from sellers, not from an Hermès size chart. In the United States, buying, importing, or reselling the item carries legal exposure under 18 U.S.C. § 2320.
What the authentic bag is
The Sac à Dépêches is a rigid briefcase with a top flap, one handle, and a lockable clasp. Catalog and auction records list the model at 38 cm and 41 cm. Leathers used include Togo, Epsom, Barenia, and Box calf. Hardware is palladium plated or gold plated. Non-current examples on the secondary market list between roughly $6,000 and $25,000, based on leather, year, and condition. Hermès sells no Sac à Dépêches smaller than 38 cm in this line.
Where the "18" comes from
No 18 cm Sac à Dépêches appears in Hermès catalogs or in the archives of major auction houses. The number is most likely a seller code, a width in centimeters for a different style, or an internal listing number. A seller who cannot point to a model name, a size in centimeters, and a production year is describing a copy, not a bag.
US law on counterfeits
- 18 U.S.C. § 2320 covers trafficking in counterfeit goods. A first offense carries up to 10 years in prison, a fine of up to $2,000,000 for an individual, and up to $5,000,000 for an organization.
- Counterfeit items are subject to seizure and destruction.
- 19 U.S.C. § 1526 covers importation of goods bearing an infringing mark.
- Civil suits under the Lanham Act, 15 U.S.C. § 1114, are separate from criminal charges and do not require a conviction.
Signals in a listing
- Price below the resale floor for a 38 cm or 41 cm model.
- Terms such as "replica," "mirror," "1:1," or quality grades. Hermès uses none of them.
- No provenance: no store receipt, no repair record, no service history.
- Photos taken from auction house listings.
- Payment by wire transfer, gift card, or cryptocurrency.
Legal routes to the bag
Authentic Sac à Dépêches examples change hands at auction houses and through established resale platforms. Hermès runs a repair and spa service for authentic items at its boutiques; a refusal of service is one indicator that a piece is not genuine. Resale prices track condition, leather, and hardware finish.
Bottom line
The search term names a counterfeit category, not a product. Hermès lists no 18 cm version of this briefcase. A buyer who wants the real item shops the secondary market and budgets for an authentic example.