33Across Opt Out: Browser, Email, and Data Steps

33Across opt out steps depend on the identifier and outcome you want to change. The official 33Across User Data Portal identifies User Data Portal browser and email opt-outs, mobile operating-system controls, and real-time access, erasure, or sale-prohibition tools. The browser tool stores the preference with cookie and cookieless methods; an email choice stores a hashed email for suppression, while broader portal rights may require identity verification. Use the matching route, save the confirmation, and keep browser, app, mobile, access, and deletion choices separate.

33Across opt out quick facts

Last checked August 31, 2026. Provider pages, privacy forms, device menus, and applicable rights can change. Start from the current provider policy and keep the smallest useful record of what you submitted.

How to opt out of 33Across

1. Open the official 33Across User Data Portal and choose the control that matches the identifier or outcome you want to change.
2. Use Browser Opt-Out in every browser profile and computer you use. Allow the portal to store the preference it needs to recognize the browser and connection.
3. Use Email Opt-Out for each email address used in audience matching. The portal says it stores a hashed representation for suppression rather than a human-readable copy.
4. Use current Apple or Android advertising privacy controls for each mobile device. A desktop browser choice does not cover a mobile advertising ID.
5. If you want to inspect, erase, or prohibit sale of matched data, use the corresponding portal right and complete only the verification requested by the official workflow.
6. Save the confirmation and repeat identifier-level choices after a browser reset, cookie cleanup, device replacement, IP change, or mobile advertising-ID reset.

Choose the right request before sharing information

A targeted-advertising choice, sale or sharing opt-out, access request, correction, deletion, consent withdrawal, and device setting can produce different results. Pick the narrow control that matches your goal. This reduces unnecessary disclosure and makes the provider response easier to verify. If the policy separates website data from service data, use the form for the context where the information was collected.

Confirm that the form and privacy email belong to the provider before entering an address, identifier, or identity document. Use only the fields the official workflow requires. Do not copy contact details from an unverified forum or send a document before the provider explains why it is needed. Keep a ticket number, confirmation email, appeal instruction, or stated deadline with the submission date.

The portal separates targeted-advertising choices from data rights. Browser Opt-Out and Email Opt-Out are suppression controls. Access My Data, Erase My Data, and Do Not Sell My Info are different actions. Select the narrowest matching route instead of assuming that an advertising choice automatically deletes every retained record.

33Across says the browser choice uses both persistent cookies and cookieless technology. That design can cover more than one browser identifier, but it is not universal. The policy still tells people to repeat the task after changing computers, browsers, browser versions, IP addresses, or stored cookies.

Email suppression is address-specific. The portal says it hashes the submitted address so it can map the request to associated advertising identifiers. A second address therefore needs its own submission. Do not add unrelated addresses or identity documents unless the portal asks for them for a selected right.

The provider states that opting out stops its collection and interest-prediction use for the covered choice, not all advertising. Contextual ads and ads delivered by other companies can continue. Mobile identifiers and independent partner controls also need their own settings.

Verification and processing behavior

The browser tool stores the preference with cookie and cookieless methods; an email choice stores a hashed email for suppression, while broader portal rights may require identity verification. Verification is a security step and a practical checkpoint. If a message does not arrive, check the entered email, identifier, request status, and whether the provider expects a different route. Avoid immediately opening duplicate tickets because that makes it harder to tell which request produced the final result.

The advertising choice stops 33Across from collecting information tied to the covered environment and using interest prediction for targeted ads; access, erase, and sale choices address matched portal data separately. Use the timeline in the official policy or confirmation for the selected request. A browser preference may update quickly while access or deletion takes longer. Partners, customers, or independent controllers can have their own systems, so one completion notice does not prove that every prior recipient changed its record on the same day.

• Save the request type, date, official domain, and confirmation or ticket number.
• Record the browser, device, app, household, identifier, or retained record the choice covers.
• Complete verification promptly and keep the response with the original submission.
• Recheck the same environment first, then test other devices and identifiers separately.

What the opt-out changes and what it does not

The advertising choice stops 33Across from collecting information tied to the covered environment and using interest prediction for targeted ads; access, erase, and sale choices address matched portal data separately. An advertising choice can reduce interest-based selection without stopping every advertisement, measurement event, security use, contextual placement, or permitted retention. A deletion request can also have exceptions described by the provider or applicable rules. Read the result narrowly instead of assuming every copy disappears from the provider, its customers, its partners, and the open web.

Apps, publishers, device makers, browsers, websites, customers, and data suppliers can maintain independent controls. A request to one provider does not automatically change those systems. When the policy points to Apple, Android, browser, industry, account, publisher, or connected-device settings, handle each as a separate layer and record the change.

Why the preference can reappear or stop working

A new browser, device, software version, IP address, cleared cookie, reset mobile advertising ID, or different email address can sit outside the earlier choice. Opt-out cookies remain in the environment they cover, while mobile choices depend on a device advertising identifier or operating-system signal. A broader privacy request may leave a limited suppression record so the provider remembers the choice. Removing that suppression record can make it harder to prevent the same identifier from being matched again.

Recheck after browser cleanup, a private-profile change, app reinstall, operating-system reset, phone replacement, connected-device change, or advertising-ID reset. If the provider receives new data later, compare the new exposure with the old confirmation before deciding whether to submit again. A matched status or provider response is stronger evidence than a temporary change in the ads you happen to see.

Broader privacy rights and manual removal

This guide maps the provider’s published controls and does not promise a legal outcome. Available rights depend on location, relationship with the provider, request type, and information involved. Use access or correction when you need to understand a match. Use deletion after reviewing verification, retention, service effects, and whether the provider acts for a customer that controls the data.

For a wider workflow, use the data broker opt-out list and the guide to removing yourself from data brokers. The opt-out guide hub groups related instructions by intent.

Build a repeatable privacy check

Manual requests work best with a small log. Keep the provider, route, request type, identifier scope, date, confirmation, verification state, response deadline, and next check date. This prevents a browser cookie from being mistaken for device-wide deletion and lets you distinguish a new identifier from a request that has not finished processing.

You can also run a free data broker scan to find other exposed records. Related reading: PulsePoint privacy guide, NextRoll browser and email guide, and The Trade Desk opt-out guide.

Frequently asked questions

Does the 33Across opt out delete all data?

No. The result depends on the selected request. Advertising, sale, or sharing choices can stop or limit a defined use without deleting every retained record. Choose the official deletion route separately when that is your goal, and review verification, client-control, retention, and exception language.

How do I know the 33Across request worked?

Keep the provider confirmation and recheck the same browser, device, app, account, household, or identifier first. A changed ad experience is weak proof because contextual ads can continue. A completed ticket, preference status, verified response, or access result is stronger evidence.

Should I repeat the request on another device?

Yes when the provider describes the choice as browser-specific, device-specific, app-specific, account-specific, household-specific, or identifier-specific. Do not assume a desktop cookie covers a phone, connected television, separate browser profile, mobile advertising ID, or a record controlled by a provider customer.

What should I do if the official form changes?

Return to the current provider privacy policy and follow its privacy-center or rights link. Compare the new route with the saved confirmation. If the form is unavailable, use the published privacy contact and state the request type and original ticket without sending more personal information than necessary.

Sources

Official 33Across User Data Portal, including browser, email, mobile, access, erasure, and sale controls, checked August 31, 2026. Open official source.

Official 33Across privacy policy, including per-browser, cookie, cookieless, IP, email, and mobile-ID limits, checked August 31, 2026. Open 33Across privacy policy.