Cookies
Last updated 9 November 2026How to control cookies on this website, and the full list of what we set. Section 12 of our privacy notice explains what we measure and why.
The complete list at the foot of this page is generated from a scan of the live site, not written by hand, so it cannot quietly fall out of date the way a typed table does. The sections above it explain what each kind of cookie is for, which a scan cannot tell you.
What a cookie is, briefly
A cookie is a small file a website asks your browser to keep. Some are needed for a site to work at all, for example to remember that you have signed in. Others exist to count visitors or to measure advertising, and those need your permission before they are set. The difference matters legally: we may set the first kind without asking, and we may not set the second kind until you say yes.
Strictly necessary cookies
These are set only if you sign in to an account. A visitor who reads the site, or who uses the seller's guide form at offmarketkeys.com/sell, is never given any of them. We do not ask permission for them, because the law does not require it where a cookie is needed to deliver the service you asked for.
- omk_session, or __Host-omk_session over a secure connection. Holds your signed-in session. No script in the page can read it. Expires after one hour.
- omk_csrf, or __Secure-omk_csrf over a secure connection. A token the page returns to us with each request, so another website cannot act as you. Expires with your session.
- omk_refresh, or __Host-omk_refresh over a secure connection. Lets your session renew quietly instead of signing you out every hour. Expires after 30 days, or when you sign out.
One more is stored whether or not you have an account:
- omk-theme, kept in your browser's own storage rather than as a cookie. Remembers whether you chose the light or the dark view. We do not ask permission for it, because it only remembers a choice you made yourself by pressing the button, and it never leaves your device. Clearing your browser data removes it.
There is no way to refuse these and still sign in, which is why they are the only cookies we set without asking. If you do not want them, do not sign in: everything a seller needs, including the guide and the home report, works without an account.
One further cookie is set once you answer the cookie banner, whichever way you answer:
- CookieConsent, set by Cookiebot. Records what you agreed to and when. It stops the banner asking again on every page, and it is the mechanism by which a refusal is honoured, so refusing still sets it. It carries your choices, not your identity.
Measurement and advertising cookies
These are set only if you accept them, and never before. We use Google Analytics to count how people move through the site and Google Ads to measure which adverts produce a request, both loaded through Google Tag Manager, with the consent banner provided by Cookiebot.
Until you answer the banner those tags are loaded in a denied state: they set no cookie, and anything they send carries no identifier for you or your device. Any that are set once you accept are named in the scanned list below.
Our privacy notice sets out what we send to Google and, more to the point, what we never send: not your name, not your email address, not your mobile number, and never your full postcode.
Changing your answer
Cookie settings appears in the footer of every page and reopens the banner, so you can change your answer as often as you want. You can also clear or block cookies in your own browser settings at any time, for this site or any other, without telling us.
Refusing changes nothing about what you can read or ask for here. The guide, the home report and the introduction to a specialist agent depend on no cookie at all.
Every cookie on this site
Scanned from the live site and updated automatically, so it describes what is actually set rather than what we last remembered to write down.