Use the owner's primary phone to open Signal Settings and its linked-devices list, then remove the old desktop there. That ends the device's link to the account; it does not recall messages or copies already stored on that computer. After unlinking, turn to a separate question: what data remains on the computer itself, and who can still reach it.
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Start with the owner's phone, not the old desktop
The primary phone's Signal Settings lists linked devices, so that is the place to review them. Open the list and check each entry rather than relying on memory. An old computer may appear under a name you no longer recognize, or several entries may look similar. Treat the list as something to verify, not as proof that a device is currently in use. [Signal Support: Linked Devices]
- On the primary phone, open Signal Settings and review the linked-devices list.
- Compare each listed entry with devices you know about.
What unlinking changes, and what it does not
Removing a linked device from the list ends that link. It must not be described as recalling every saved message, attachment, or copy that was synchronized to the device. Linked devices have their own synchronized chat data, so unlinking does not reach into a computer and erase what is already stored there. Keep the two outcomes separate: the link is ended on the account side; local copies remain a separate question. [Signal Support: Linked Devices]
Review the list before removing anything
A short review reduces mistakes. Note the devices shown on the owner's phone and identify which one is the old desktop. If an entry is unclear, pause and confirm what the device is before removing it. Unlinking the wrong entry can interrupt a device you still need, while rushing past an unfamiliar entry can leave a question unanswered. This is a verification habit, not a sign that anything suspicious has occurred.
| observation | limit | next step |
|---|---|---|
| An unfamiliar device name appears | A name alone does not prove who used it or when | Confirm what the device is before deciding whether to unlink |
| A known old desktop is listed | The listing does not show what local files it holds | Unlink it if appropriate and treat local copies separately |
| No devices appear in the list | This does not show that no copies exist elsewhere | Turn to the local-data question below |
Handle local copies on the old computer
Unlinking is an account-side action, so data on the old desktop needs its own decision. Because linked devices hold their own synchronized chat data, unlinking does not remove what is stored on that machine. If the computer is in your possession, follow your own ordinary data-handling practice there. If it is not, do not assume unlinking reaches it; think through who may still have access to the machine and act within safe, lawful bounds. the provider's guidance supports the link being ended, not any claim about what a particular computer still contains. [Signal Support: Linked Devices]
Keep the incident response proportionate
A breakup is emotionally difficult, and it is easy to turn a device review into a larger investigation. Stick to what the phone's linked-devices list actually supports. Do not conclude from a device name or from an absent entry that someone did something specific. If real concerns about account access or shared images arise, take the protective step you can control first and keep a simple record of what you have already done.
- Note the date you reviewed and unlinked devices.
- Write down any separate data-handling decisions you made about the computer.
A couple more questions
Does unlinking an old Signal Desktop erase messages already stored on that computer?
No. Unlinking ends the device's link to the account. It should not be treated as recalling synchronized chat data or copies already saved on that computer.
Where do I find the linked-devices list?
The primary phone's Signal Settings lists linked devices. Confirm the device entries there before removing one.
What comes after unlinking?
Separately address local data on the old computer, since unlinking does not remove what is already stored there. Then keep to proportionate steps based on what the linked-devices list actually shows.
Sources & editorial notes
Official references checked on October 23, 2026. Checklists, comparison tables and example wording are DateClues editorial tools, not official tests or validated risk scores.
General information. No guide or tool can certify a person’s identity, intentions or safety. Read our editorial standards.