At a glance
| Provider | AppsFlyer |
|---|---|
| Category | Marketing |
| Consent required? | Yes |
| Typical domain | Varies (first-party) |
Do you need consent for afUserId?
Yes. afUserId 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 afUserId 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 afUserId cookie?
Yes. afUserId 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 afUserId cookie do?
Unique user identifier set by the AppsFlyer web SDK (first-party cookie) for campaign and conversion attribution.
Who sets the afUserId cookie?
The afUserId cookie is associated with AppsFlyer and is classified as marketing.