Authentication & Quality Assurance

At Tongtongcita, every item we sell is carefully authenticated before sale. We are committed to providing our customers with only authenticated, verified luxury goods.

Our Authentication Process

Every item goes through a rigorous multi-step authentication process before being listed for sale:

  • Expert Inspection: Each item is carefully examined by our team of experienced luxury goods specialists.
  • Hardware & Stitching Check: We verify the quality and consistency of hardware, stitching, and materials against authentic references.
  • Serial Number & Date Code Verification: All serial numbers, date codes, and stamps are cross-checked with brand records.
  • Packaging & Accessories: Original dust bags, boxes, receipts, and cards are verified where available.
  • Entrupy Authentication: We offer Entrupy authentication services for all items. Entrupy is a leading AI-powered technology trusted by luxury resellers worldwide to scientifically verify item authenticity. Authentication is complimentary for standard items. For Entrupy premium items, an additional fee applies — please contact us for a quote.

Our Guarantee

We stand behind every item we sell. If for any reason an item you purchased from us is found to be inauthentic by a recognized authentication service, please contact us and we will work to resolve the issue, including offering a full refund where applicable.

Shop with Confidence

Your trust is our top priority. We have helped hundreds of customers find their dream luxury pieces with complete peace of mind. When you shop at Tongtongcita, you can be confident that every item has been carefully authenticated before it reaches you.

Contact Us

If you have any questions about our authentication process or a specific item, please don't hesitate to reach out to us. We are happy to provide additional photos, documentation, or information upon request.

Trade Name: KOUMEI CO., LTD. (皓銘株式会社)

Shop Name:  Tongtongcita

Phone Number: 045-654-3356

Email: info@tongtongcita.com

Physical Address: 504 BUILDING, Ichigaocho 1157-5,Aoba-ku, Yokohama-shi, 225-0024,Japan