Short answer: Signup itself (email + OTP) requires no documents. However, if you want to pay by bank transfer and receive a Korean tax invoice, you'll need a copy of your business registration certificate and a copy of your bank book.
Documents required by stage
Stage | What's needed |
Signup | Email address only (no documents) |
Stripe card payment | Card info only (no documents) |
Bank transfer payment | Business registration certificate copy + bank book copy |
Tax invoice issuance | Business registration certificate + bank book + recipient info (name·email) |
VAT exemption | Business registration number |
Signup process (no documents required)
Enter your email at library.trendier.ai
Enter the OTP code emailed to you → signup complete
Fill in profile info (company, role, etc.)
Choose a plan and pay on the checkout page
Common follow-up questions
Can sole proprietors sign up?
Yes. Although Trendier is a B2B service, you can sign up with a personal email.
Can foreign entities receive a tax invoice?
Korean tax invoices are issued based on Korean business numbers. Foreign entities should use the Stripe receipt.