What Personal Information Should You Avoid Sharing Online?

Passwords, verification codes, identity documents, financial information and confidential records should not be shared publicly or given to unverified people. Other details, including your full name, birthday, phone number, home address, school, workplace and location, require careful judgment before disclosure.

The difficulty is that personal information does not appear only in forms asking for your details. It can be visible in a photograph, a screenshot, a social media profile, a group conversation or a location tag. Information that seems ordinary on its own can also reveal more when combined with other details.

At the same time, sharing personal information is sometimes necessary. Applying to a university, receiving healthcare, making a payment or verifying your identity may require genuine personal details.

The practical question is not whether you should stop sharing personal information online. It is what information you are sharing, who needs it, why they need it and whether the method of sharing provides appropriate protection.

What Counts as Personal Information Online?

Personal information is information that identifies you or can reasonably help someone identify you.

It includes familiar details such as your name, address, telephone number, photograph and date of birth. Depending on the circumstances, information such as your location, internet protocol (IP) address or identifying characteristics may also count.

The Australian Office of the Australian Information Commissioner explains that whether information identifies someone depends partly on the circumstances and what other information is available. Its legal definitions apply in Australia, but the underlying distinction is useful when thinking about privacy more generally.

Not all personal information requires the same level of protection.

A professional may have a reason to publish their name and work email address. A student may need to provide their date of birth when registering for an official service. Neither situation creates a reason to publish private identification documents, account passwords or unnecessary contact details.

The important distinction is between information that must remain confidential, information that should be disclosed only through a verified process, and everyday identifying details whose suitability for sharing depends on context.

Which Personal Information Should You Avoid Sharing?

The following categories deserve particular attention when posting online, communicating with unfamiliar accounts or submitting information through websites and applications.

The UK's Information Commissioner's Office (ICO) advises caution when making names, addresses, birthdays, financial information, schools and workplaces widely available online. Its guidance also emphasizes checking who is collecting personal data and why it is necessary.

Passwords and Verification Codes Should Stay Confidential

A password protects access to an account. A verification code helps confirm that someone is authorized to complete a sign-in or security action.

These details should not be disclosed to someone who contacts you through a message, telephone call or unfamiliar account, even when that person claims to represent customer support.

There is an important difference between entering a code into an official sign-in process you started and sending the same code to someone who unexpectedly asks for it.

For example, a person claiming to be from a messaging service may ask you to forward a verification code to confirm account ownership. That request should not be treated as proof of legitimate support activity.

The Australian Cyber Security Centre specifically warns against sharing passwords, registration codes and verification codes with accounts claiming to represent service providers.

Account recovery questions need similar care. Details such as a birthplace, relative's name or previous address may be visible elsewhere online. Using publicly discoverable information as a recovery answer weakens its usefulness as a security check.

For further account protection, Collegenp's article on everyday cybersecurity habits covers password security, additional sign-in protection and related precautions.

Identity Documents and Financial Information Need Verified Channels

Identity documents often contain several identifying details in one place.

Depending on the document and country, these may include an identification number, photograph, signature, date of birth and address.

Publishing a complete identity document on social media is different from providing it to an organization through an established verification process.

Consider a student applying for admission or a scholarship. The official application may require identity or academic documents. Providing those records through the verified application system may be appropriate.

Sending the same documents to an unfamiliar social media account claiming to handle applications is a different decision. The applicant has not established who will receive the information or how it will be handled.

Financial details require similar care. A legitimate purchase may require payment information, but an unexpected request for bank details should not be treated as equivalent to a transaction you initiated.

The relevant questions are whether the recipient is genuine, whether the information is necessary and whether the submission method is appropriate.

Contact Details, Birthdays and Locations Depend on Context

A name or email address is not automatically too private to publish. Its suitability depends on the purpose and audience.

For someone seeking employment, providing a professional contact address may be useful. Publishing a private telephone number and home address alongside it may expose more information than the situation requires.

Birthdays also illustrate this distinction.

Sharing birthday greetings does not necessarily reveal a person's complete date of birth. Publishing a full birth date alongside a birthplace, family details and previous addresses makes more identifying information available.

Location information raises another consideration: timing.

A general reference to a city may reveal limited information. Sharing a precise location and current activity can disclose where someone is at a particular moment. Repeated location updates may reveal a routine.

The Australian Cyber Security Centre recommends restricting unnecessary personal details, reviewing location-sharing features and considering whether photographs contain location information.

Sharing your location with a trusted person for a specific purpose is different from making it available to a broad audience.

Why Can Small Personal Details Reveal More Than Expected?

Personal details that appear ordinary separately can become more revealing when viewed together.

Someone looking at a public profile may learn a person's name, school or workplace. Photographs, comments and event information may provide additional context.

For example, a student may post a school photograph and later share an event announcement containing the venue and time. Neither post necessarily contains confidential information. Viewed together, however, they may reveal where the student is expected to attend an activity.

This does not mean that sharing a school photograph will cause harm. It means that the combined information communicates more than either post alone.

The Australian Cyber Security Centre explains that posts, messages, photographs and videos can be combined into detailed profiles. Such information may be used in social engineering, where someone manipulates another person into disclosing information or taking an action.

One possible consequence is a more convincing fraudulent message.

A message referring to a real workplace, course or recent activity may appear more credible because it contains accurate background information. The Federal Trade Commission (FTC) warns that phishing messages can impersonate recognizable organizations and request personal or financial details.

The practical lesson is to consider what your public information reveals collectively, rather than evaluating every detail in isolation.

What Should You Check Before Posting a Photo or Screenshot?

Photographs and screenshots can expose information that was not the intended subject of the post.

A caption may contain no personal details while the image itself shows a badge, document, timetable, address or recognizable location.

Look at the Entire Image, Not Only Its Subject

Before publishing a photograph, examine the background and any visible text.

A school uniform may identify an institution. A document on a desk may reveal an address or identification number. A photograph taken at home may show information the person did not intend to make public.

Screenshots deserve equal care because they often capture more of an application or document than the sender needs to share.

A student seeking help with an examination result, for instance, may need to show a particular message or status. The complete screenshot may also display a student identifier, account details or unrelated personal information.

Where possible, crop out unnecessary sections or cover identifiers that are not relevant to the question.

The purpose is not to remove every trace of identity from ordinary photographs. It is to avoid disclosing information unrelated to what you intend to communicate.

Consider Location Tags and Posting Time

A photograph can reveal location through recognizable surroundings, captions, location tags or information stored with the image.

Some original image files contain location metadata, but what remains accessible after uploading depends on the device, file and platform. It would be inaccurate to assume that every uploaded photograph publicly exposes GPS coordinates.

Visible information may be more important than hidden metadata.

A recognizable location combined with a live caption can communicate someone's current whereabouts, regardless of whether the original file retains location data.

If sharing your location is unnecessary, consider removing the tag, limiting the audience or publishing the photograph after leaving the location.

Consider the Privacy of Other People

Posting a group photograph also involves the privacy of the people pictured.

Someone may have agreed to participate in an event without agreeing to have their photograph published on a public account.

The Australian eSafety Commissioner recommends obtaining consent before sharing identifiable photographs or videos and respecting requests to remove them.

Children's information deserves additional consideration.

A photograph may reveal a child's face, school uniform, location or activities. Parents, teachers and event organizers should consider whether the child is comfortable with the disclosure, who will see it and whether identifying information is necessary.

Applicable consent rules vary by country and circumstances. Permission to take a photograph should not automatically be treated as permission to publish it widely.

Does a Private Account Make Personal Information Safe?

Privacy settings can restrict the initial audience for information, but they cannot guarantee that recipients will keep it private.

A private account, restricted group or direct message may offer more control than a public post.

However, someone with access may still copy, screenshot, forward or redistribute the information.

That distinction matters when sharing personal conversations, identification documents or photographs.

A class group created for discussing assignments, for example, may be an appropriate place to share course-related information. It is not automatically an appropriate place to publish another student's private documents or contact details.

Group membership can also change. A conversation that initially includes familiar people may later include members the original sender does not know personally.

The Australian Cyber Security Centre advises users to review group membership, account privacy settings and the information shared through messaging services.

Privacy settings are useful, but the decision about what to disclose remains important even within a restricted audience.

When Is Sharing Personal Information Online Appropriate?

Sharing personal information online can be appropriate when a legitimate service genuinely needs it and the recipient and submission process have been verified.

The aim is not to prevent people from applying for education, seeking employment, receiving healthcare or using financial services.

It is to avoid providing unnecessary information to an unverified recipient.

Verify Who Is Requesting the Information

A familiar institution's name or logo is not sufficient proof that a message is genuine.

If a bank, employer, educational institution or service provider unexpectedly requests sensitive information, verify the request through an official contact method you find independently.

Do not rely solely on the link or telephone number supplied in the unexpected message.

The FTC recommends contacting the organization through a telephone number or website you already know is genuine when a message appears suspicious.

A secure website connection is important, but it does not independently prove that a website belongs to the organization it claims to represent.

The ICO explicitly warns that the presence of a browser padlock alone does not guarantee that you are visiting the intended website.

For more on evaluating questionable requests, Collegenp's article on checking suspicious online claims and scams provides related guidance.

Provide Only the Information Needed

A legitimate request does not necessarily require every personal detail.

An application may require your name, contact information and a specific document. That does not automatically establish a need for unrelated records or access to your personal contacts.

Before submitting information, examine which fields are required, which are optional and what purpose the information serves.

For example, an official application may require an authentic identity document. A public portfolio displaying the applicant's work usually does not need that document.

This distinction is particularly relevant to students and job applicants who use several online services and may be asked to upload similar records in different places.

When the reason for collecting a detail is unclear, seek clarification through the organization's verified contact channel.

Check What Apps and Online Tools Request

Applications and digital services may request access to photographs, contacts, location, camera or microphone.

Consider whether each permission is relevant to the task.

An application used to submit a document may need access to a selected file. That purpose does not automatically justify unrestricted access to other personal information stored on the device.

Apply the same judgment when uploading material to online questionnaires, unfamiliar websites or AI tools.

Check the provider's identity, privacy information and relevant settings before submitting identifiable records. Do not assume that different services collect, retain or use uploaded information in the same way.

Where the task does not require real personal details, removing identifiers from the material before uploading can reduce unnecessary disclosure.

How Can You Decide Whether Something Is Safe to Share?

The following five questions provide a practical way to evaluate an uncertain disclosure.

These questions do not establish that a particular disclosure is risk-free. They help distinguish necessary information sharing from avoidable exposure.

For example, publishing a professional email address so an employer can contact you has a clear purpose. Including your home address, full birth date and personal documents in the same public profile usually requires a separate justification.

What Should You Do If You Already Shared Personal Information?

The appropriate response depends on what was disclosed and where it appeared.

Sharing a password creates a different concern from publishing a photograph or exposing an address.

An accidental disclosure also does not establish that someone has misused the information.

If You Shared a Password or Verification Code

If a password may have reached someone unauthorized, change it through the service's official website or application.

Change the same password on other accounts where it was reused. Review account activity and available security settings, and enable multifactor authentication where offered.

If you sent someone a login verification code, check the relevant account through its official service. Look for unfamiliar sign-ins or account changes, and contact legitimate support if you suspect unauthorized access.

A code may expire, but expiry alone should not be treated as proof that an account is unaffected.

The FTC's recovery guidance recommends changing compromised passwords, protecting accounts with additional authentication and using official account recovery processes when access has been lost.

If You Shared Financial Details or an Identity Document

Contact the relevant bank, payment provider, identity-document issuer or responsible authority through an independently verified channel.

Explain what was disclosed and ask which protective steps apply.

Depending on the situation, the provider may advise account monitoring, payment security measures or a document-related process.

If you identify signs of misuse, use the reporting and recovery services available in your country.

The FTC provides U.S.-specific reporting and recovery guidance. Its procedures should not be assumed to apply identically in other countries.

This guidance is general safety information, not individualized financial or legal advice.

If You Published a Photo, Address or Private Record

If you control the post, remove it or restrict its visibility where possible.

Check whether the information also appears in captions, comments, tags or other uploads.

Where another person or organization published the material, request removal or correction through an appropriate channel.

If a disclosure involves another person's private information, particularly a child's, avoid redistributing it and seek assistance from a trusted adult or responsible organization when safety concerns arise.

Removing a post can reduce exposure, but it does not guarantee that copies were not made before removal.

For a broader review of previously shared material, Collegenp's article on managing your digital footprint explains how to examine public profiles, older posts and information published by others.

If Your Information Appears in Search Results

Removing information from a search engine and removing it from the original website are separate actions.

Google explains that it can prevent qualifying content from appearing in its search results, but it cannot directly delete material hosted on an unrelated website. The website owner controls the original content.

Where possible, request removal from the website or platform hosting the information.

If personal contact information appears in Google Search, you can also review Google's applicable removal procedures. Its "Results about you" service supports certain personal-information searches and removal requests, although feature availability and eligibility vary.

A request may be accepted or rejected under the service's policies. Removing a search listing does not guarantee that the information has disappeared from the internet or from other people's copies.

Conclusion

Protecting personal information online requires understanding both the information itself and the circumstances in which it is shared.

Passwords and verification codes should remain confidential. Identity documents, financial information and private records should be provided only when necessary through verified processes.

Other details, such as names, photographs, birthdays, contact information and locations, require decisions about purpose, audience and possible exposure.

Before sharing, consider whether the recipient genuinely needs the information, whether the process is trustworthy and whether unnecessary details can be excluded.

If information has already been disclosed, identify exactly what was exposed and take the measures appropriate to that information. The aim is to reduce avoidable exposure while retaining access to the legitimate online services and opportunities you need.

References

1. Office of the Australian Information Commissioner. What is personal information?. Australian Government. Definitions and examples of identifying and sensitive information.

2. UK Information Commissioner's Office. Online safety. United Kingdom. Personal-information disclosure, privacy settings, online identity protection and verification of websites.

3. Australian Signals Directorate, Australian Cyber Security Centre. Security tips for social media and messaging services. Last reviewed 9 April 2026. Online information exposure, account credentials, location sharing, app permissions and privacy controls.

4. U.S. Federal Trade Commission. How to recognize and avoid phishing scams. FTC Consumer Advice, September 2022. Impersonation, fraudulent information requests and independent verification.

5. Australian eSafety Commissioner. Consent for sharing photos and videos. Australian Government. Permission, image sharing, privacy and removal requests.

6. U.S. Federal Trade Commission. What to do if you were scammed. FTC Consumer Advice, June 2026. Responses to compromised account information, identity-related disclosures and fraud; U.S.-specific recovery procedures.

7. Google Search Help. Content removal options outside of Google Search. Google. Distinction between removing content from its original website and removing search results.

8. Google Search Help. Find and remove personal info in Google Search results. Google. Personal-information removal requests, supported features and eligibility limitations.