Cookie Policy
Last updated: 28 May 2026
1. What Are Cookies?
Cookies are small text files that a website places on your device when you visit it. They're used to make sites work properly, keep you signed in, remember preferences, and help us understand how our service is being used.
This Cookie Policy explains how Kolva Seller (a product of Kolva Ltd — “we”, “us”, “our”) uses cookies and similar technologies such as browser local storage when you use our service.
2. Essential Cookies (Always Active)
These cookies are strictly necessary for Kolva Seller to function. They cannot be turned off in our system because the service won't work without them.
| Cookie | Purpose | Retention |
|---|---|---|
| authjs.session-token | NextAuth signed-in session token. httpOnly, sameSite=lax. | Up to 24 hours |
| authjs.callback-url | NextAuth post-login redirect target. httpOnly. | Transient (sign-in flow) |
| authjs.csrf-token / __Host-authjs.csrf-token | CSRF protection for sign-in and account forms. httpOnly. | Session |
| kolva-ebay-return-to | Remembers where to send you back after eBay OAuth (onboarding vs. settings). httpOnly. | 10 minutes |
| kolva-onboarding-bypass | Lets you through the onboarding gate immediately after a successful eBay connect, before the session refreshes. | Up to 24 hours |
| kolva-onboarding-skipped | Records that you soft-skipped the onboarding wizard for this browser session. | Session |
3. Preference Cookies
These remember choices you make so Kolva Seller feels consistent across visits. They're optional — if you disable them you'll just lose personalisation.
| Cookie | Purpose | Retention |
|---|---|---|
| kolva.theme | Remembers light/dark mode (if available). | 12 months |
| kolva.sidebar | Remembers whether your sidebar is collapsed or expanded. | 12 months |
4. Browser Local Storage
In addition to cookies, Kolva Seller uses your browser's local storage to cache draft listing data and UI state. Local storage stays on your device and is never transmitted to our servers unless you explicitly submit it.
5. Third-Party Cookies
Some third-party services we integrate with may set their own cookies when you interact with them through Kolva Seller:
| Provider | Purpose | Retention |
|---|---|---|
| Stripe — privacy policy | Payment processing and fraud prevention on billing pages. | Up to 12 months |
| Cloudflare — privacy policy | Network security, bot protection and tunnelling traffic to our origin servers. | Up to 12 months |
| Analytics & marketing | We do not currently set analytics or marketing cookies. If we add a privacy-respecting analytics provider in future, this page will be updated and consent re-requested before any such cookies are set. | None set |
We do not use advertising cookies.
Kolva Seller does not run advertising trackers, build behavioural profiles, or sell your data to third parties.
6. Managing Your Cookies
You can manage or delete cookies in two ways:
- Our consent banner. When we add optional cookies you'll see a banner on your first visit. You can revisit your choices at any time from the link in the site footer once it ships.
- Your browser settings. Every modern browser lets you block, delete or limit cookies. See the help pages for Chrome, Firefox, Safari or Edge.
Note: blocking essential cookies will prevent you from signing in or using Kolva Seller's drafting and publishing features.
7. Updates To This Policy
We may update this Cookie Policy as the product evolves — for example, when we add new integrations or analytics. When we do, we'll change the “Last updated” date at the top of this page and, for material changes, show a notice inside Kolva Seller.