Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
Not for external distribution
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "Not for external distribution" is correct and usable in written English.
It is typically used to indicate that a document or information is intended for internal use only and should not be shared outside the organization. Example: "Please ensure that this report is marked as confidential and labeled 'Not for external distribution' before sharing it with the team."
✓ Grammatically correct
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified similar examples from authoritative sources
Similar Expressions
60 human-written examples
We have not accounted for external sources of noise.
Science
Social networks are not for private file distribution.
News & Media
Take the lead from within the organization; don't wait for external condition changes.
News & Media
Many of the cultures are not ready for distribution.
News & Media
I didn't do this for external reasons.
News & Media
This method is not recommended for mass distribution at YUL.
Academia
"Prescription medicines are not priced for widespread distribution.
News & Media
Not some external force.
News & Media
Not counting foreign distribution.
News & Media
(4) Don't pay for distribution.
News & Media
He said a not-for-profit system would attract fewer external providers.
News & Media
Expert writing Tips
Best practice
When labeling documents, always include the phrase "Not for external distribution" prominently, preferably in the header or footer, to ensure visibility and prevent accidental sharing.
Common error
Failing to explicitly label a document with "Not for external distribution" increases the risk of it being unintentionally shared outside the intended audience. Always make the restriction clear and visible.
Source & Trust
60%
Authority and reliability
4.2/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "Not for external distribution" functions as a restrictive modifier, limiting the scope of access to a particular document or piece of information. It clearly indicates that the material should not be shared with individuals or entities outside a specific group.
Frequent in
Science
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News & Media
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Formal & Business
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Less common in
Science
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News & Media
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Formal & Business
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Ludwig's WRAP-UP
The phrase "Not for external distribution" is a clear and direct way to indicate that a document or information is intended for internal use only. Although Ludwig's examples are limited, it is clear and grammatically correct. Consider using it prominently on sensitive materials to prevent unauthorized sharing. Alternatives like "Internal use only" or "Confidential information" can be used depending on the specific context and level of restriction required.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
Internal use only
Focuses directly on the intended audience.
Confidential information
Highlights the sensitive nature of the content.
Proprietary information
Emphasizes ownership and restricted usage.
For internal audiences only
Specifies the intended recipients of the information.
Do not share externally
Directly prohibits external sharing.
Company confidential
Highlights that the material should not be exposed to external stakeholders.
Not for public release
Clearly states restriction from going to the public.
Restricted access
Indicates that the data must be kept from external parties.
Private and confidential
Emphasizes the sensitivity and privacy of the material.
Limited distribution
Specifies distribution is only to a select set of individuals.
FAQs
What does "Not for external distribution" mean?
It means the document or information is intended only for internal use and should not be shared with individuals or entities outside the organization.
What are some alternatives to "Not for external distribution"?
Alternatives include "Internal use only", "Confidential information", or "Proprietary information" depending on the specific context.
Where should I place the label "Not for external distribution" on a document?
It's best to place it prominently in the header or footer of each page, as well as on the cover page, to ensure it's clearly visible.
Is it sufficient to verbally communicate that something is "Not for external distribution" without a written label?
While verbal communication is helpful, it's not sufficient. A written label provides a clear and persistent reminder of the document's restricted status.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
60%
Authority and reliability
4.2/5
Expert rating
Real-world application tested