Asen Tannery · Deri OSB Istanbul · LWG Gold Certified
Every piece of leather has a story — where it came from,
how it was made, and what it cost the planet.
We believe the brands we work with deserve to see that story.
Not as a marketing claim, but as verifiable data — origin, carbon footprint,
chemical compliance — all tied to a single tracking code
stamped on every hide that leaves our tannery.
Asen Passport is our commitment to full transparency.
We are among the first tanneries in the world to offer
lot-level traceability with real environmental data to our partners.
— Asen Tannery, Istanbul · Since 1982
Track your leather
Enter the tracking code stamped on the back of your leather
The code is printed on the flesh side of every hide · Format: XXX-XXX
ASEN PASSPORT
Customer Portal
Invalid credentials. Please try again.
Welcome back
Your leather supply — full traceability
Every hide in your supply chain is LWG Gold certified, fully traceable from origin to finished leather, and produced with 59% lower carbon footprint than the industry average. Below you'll find the complete record of your production lots — tap any lot to view its full passport.
Lot Code
Article
Color
Production Date
Certificates & Compliance Documents
G
LWG Gold Certificate
Leather Working Group Gold rated · Category C: Raw hide to finished leather Audit: October 2024 · Valid until October 2026 · Ref: ASE101