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Check what data is being shared
The first step is to find out who is sharing your data and why. This could include companies, apps, websites, banks, insurers, or public bodies.
Look at the privacy notice, cookie settings, and account settings. These often explain what information is collected, who it is shared with, and whether you can change those settings.
Use your rights under UK data protection law
In the UK, the UK GDPR and Data Protection Act 2018 give you rights over your personal data. In many cases, you can ask an organisation to stop using your data for direct marketing.
You can also object to some types of processing, especially where the organisation says it is using your data because of a “legitimate interest”. If the objection is valid, they should stop unless they can show strong reasons to continue.
Change your privacy and sharing settings
Many websites and apps let you control data sharing through your account settings. You may be able to switch off personalised ads, third-party sharing, or location tracking.
On your phone, you can also review app permissions. Turning off access to contacts, photos, microphone, or location can reduce how much information is shared.
Ask organisations to stop sharing your data
You can contact the organisation directly and ask them to stop sharing your personal data. Be clear about what you want, such as stopping marketing emails, removing you from data-sharing lists, or deleting unnecessary information.
It is helpful to make your request in writing and keep a copy. Under UK rules, organisations usually have one month to respond to a data subject request.
Use opt-outs for marketing and cookies
If your data is being used for marketing, you can usually opt out at any time. Look for unsubscribe links in emails or “opt out” links in text messages and online accounts.
For websites, cookie banners often let you reject non-essential cookies. You can also change browser settings or use privacy tools to limit tracking across sites.
Complain if your request is ignored
If an organisation refuses your request or does not respond, ask for an internal review or escalate the complaint. Keep records of emails, dates, and any replies.
If you are still unhappy, you can complain to the Information Commissioner’s Office (ICO). The ICO oversees data protection in the UK and can investigate poor handling of personal data.
Be aware of limits
You cannot always stop all data sharing. Some organisations must share information because of legal obligations, fraud prevention, safeguarding, or contractual needs.
Even so, you can usually reduce unnecessary sharing and challenge misuse. Taking a few steps now can give you much more control over how your data is used.
Frequently Asked Questions
Opt out of data being shared means choosing to stop your personal information from being disclosed, sold, or otherwise shared with certain third parties, depending on the organization's policies and applicable laws.
You can usually opt out of data being shared with third parties by using the privacy settings, account controls, opt-out form, or contact method provided by the organization that collects your data.
Eligibility depends on the organization and the law that applies, but in many cases any user, customer, or account holder may be able to request opt out of data being shared for their personal data.
Opt out of data being shared can apply to data such as contact details, browsing activity, purchase history, device identifiers, location data, and other personal information, depending on the service and legal requirements.
Not always. Opt out of data being shared may stop certain sharing activities, but some data may still be shared for legal compliance, security, fraud prevention, or essential service operations.
Processing times vary by organization, but opt out of data being shared requests are often handled within days or weeks. Some companies may confirm the request immediately and apply it after a short delay.
In most cases, opt out of data being shared should not prevent you from using the core service, but some personalized features, ads, or recommendations may become less relevant or unavailable.
Yes, many organizations allow you to reverse opt out of data being shared later by changing your privacy settings or submitting a new request, though the process depends on the provider.
You can confirm opt out of data being shared was successful by checking the account privacy settings, looking for a confirmation email or message, or contacting customer support for verification.
Usually opt out of data being shared applies to future sharing, not necessarily data already shared before the request was processed. Some organizations may also limit further use of previously shared data, depending on policy and law.
In many cases, parents or legal guardians can request opt out of data being shared for a child's account or personal data, subject to the organization's verification requirements and applicable laws.
No. Opt out of data being shared limits how your data is shared, while deleting your account usually removes or deactivates the account itself. You may be able to do one without doing the other.
Opt out of data being shared may not stop all recipients because some disclosures are necessary for service providers, legal obligations, or security purposes, and some data may already be under separate agreements or permissions.
Some organizations ask for account details, email verification, or identity confirmation to process opt out of data being shared. The specific proof required depends on the sensitivity of the data and the law.
Yes, many mobile apps let you opt out of data being shared through in-app privacy settings, device privacy controls, consent banners, or by contacting the app provider directly.
Often it can reduce or stop targeted advertising related to your data being shared, but you may still see contextual ads or ads based on limited data that are not controlled by sharing preferences.
Yes, depending on where you live, privacy laws may give you rights to opt out of data being shared, especially for data sales, targeted advertising, or certain types of profiling.
If you do not have an account, you may still be able to opt out of data being shared by using a website privacy request form, cookie preferences, email request, or a recognized browser-based opt-out tool.
Yes, many organizations allow opt out of data being shared requests by email if you include the information they need to identify your records and specify your privacy preference clearly.
If opt out of data being shared is ignored, you should follow up with customer support, keep records of your request, review the organization's privacy policy, and consider filing a complaint with the relevant privacy authority if available.
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