visitor id not changing after deleting cookies (mobile website) | Community
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J
joe_black
May 19, 2023
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visitor id not changing after deleting cookies (mobile website)

  • May 19, 2023
  • 2 replies
  • 1706 views

Hi all,

 

Lately, I am encountering some weird behaviours of the visitor id value. 

So, what happens is this:

- I open my website on chrome from an Android phone

- I accept the cookies and I am assigned a visitor ID (ex "123456").

- I delete all the cookies (especially the demdex ones).

- I close the browser, I open it again and I accept the cookies again.

- I am assigned exactly the same visitor ID ("123456") that was aassigned before to me.

How is it possible? If I do the same procedure navigating from the web (not mobile), the visitor ID assigned is always different (as it should be).
Any insight on how and why this is happening? 

Thank you very much in advance for any help you'll give me.

Regards,

Sofia

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Best answer by Jennifer_Dungan

Adobe might be reassigning the value based on your Device ID?? I know Adobe tries to do its best to re-identify users; so that our UV stats aren't impacted by - or less impacted - by things like ITP....

 

This is the first time I've actually heard someone consider features to improve UV counts an issue 😉 

 

What about using an Incognito or Private tab on your mobile browser? Does that work?

2 replies

Jennifer_Dungan
Community Advisor and Adobe Champion
Jennifer_DunganCommunity Advisor and Adobe ChampionAccepted solution
Community Advisor and Adobe Champion
May 19, 2023

Adobe might be reassigning the value based on your Device ID?? I know Adobe tries to do its best to re-identify users; so that our UV stats aren't impacted by - or less impacted - by things like ITP....

 

This is the first time I've actually heard someone consider features to improve UV counts an issue 😉 

 

What about using an Incognito or Private tab on your mobile browser? Does that work?

    J
    joe_blackAuthor
    May 22, 2023

    Hi Jennifer,

    It is a good insight the device ID, I will surely look into it better, thanks, even though this behaviour seems to happen only on certain browser like Chrome, Edge, and Canary.

    If I use Opera that does not happen, and firefox and Safari I could not test them yet, but I am pretty sure that because of their ITP I am going to be assigned a different visitor id each time I delete cookies.


    As for your question, if I use an incognito tab on mobile, I am assigned a new visitor ID every time I close and open the tab again, which is what I expect.

     

    Apart from the device ID, I was also thinking that maybe the IP address could be used by Adobe to identify ''returnirng'' users, but even by using a VPN service, the results do not change. 
    I am just trying to understand if what is happening is a behaviour that depends on Adobe, or if I have to look for the issue in my code.

     

    Hemang35
    Hemang35
    Level 5
    May 19, 2023

    Hi Sofia,

    What you're encountering seems unusual because typically, when you delete cookies (including the demdex cookie), you should be assigned a new visitor ID when you visit the site again, since the Adobe Experience Cloud ID Service uses the demdex cookie to store the visitor ID.

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