Secure your docs only to specific people
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Try it!
When you need to prevent recipients from forwarding a shared link, use the Specific people permission.
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Select Share.
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Select Link settings.
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Choose Specific people.
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Decide if you want to Allow editing.
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Select Apply.
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Add names or email addresses for who you want to share with.
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Select Send.
The recipient will receive a link in their email that only works for them and can't be forwarded.