At a glance
| Provider | Index Exchange |
|---|---|
| Category | Marketing |
| Consent required? | Yes |
| Typical domain | Varies (first-party) |
Do you need consent for CMID?
Yes. CMID is a "Marketing" cookie, so it is not strictly necessary. Under the ePrivacy Directive (2002/58/EC) and Romania's Law 506/2004, you must obtain the visitor's explicit consent before setting it.
This is general guidance, not legal advice — always verify with a lawyer.
How FewCookies handles this cookie
FewCookies recognises CMID from our database of 1,300+ known cookies and classifies it automatically as "Marketing". The free check tells you whether this cookie is detected on your site and whether your banner handles it correctly — an instant, surface-level check, no account needed.
Frequently asked questions
Do you need consent for the CMID cookie?
Yes. CMID is a "Marketing" cookie, so it is not strictly necessary. Under the ePrivacy Directive (2002/58/EC) and Romania's Law 506/2004, you must obtain the visitor's explicit consent before setting it.
What does the CMID cookie do?
Index Exchange cookie for identifying users in ad auctions.
Who sets the CMID cookie?
The CMID cookie is associated with Index Exchange and is classified as marketing.