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
authorization letter
Grammar usage guide and real-world examplesUSAGE SUMMARY
"authorization letter" is correct and can be used in written English.
It is typically used when a person is authorizing someone else to do something on their behalf. For example: "John Smith has given me an authorization letter to sign important documents on his behalf."
✓ Grammatically correct
Academia
News & Media
Science
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
15 human-written examples
Barbusin maintained that the authorization letter gave him federal authority to possess the weapon.
News & Media
The agency would send the owner an authorization letter allowing a mechanic to install the switch.
Please have the third party email the Billing Office at [email protected] with an authorization letter on company letterhead.
Prosecutors and police argued that Barbusin used the authorization letter to bypass records checks and a 30-day waiting period to obtain the weapon for his personal use.
News & Media
Once the authorization letter has been received and processed by Billing and Payment Services a conditional credit will be placed on the student account.
Michael Rochford, who heads another Williamsburg nonprofit developer, the St .Nicholas Neighborhood Preservation Corporation, said that despite trying for years, his group had never been able to get a site authorization letter from the city.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
45 human-written examples
The so-called site authorization letters are typically given to 5 to 10 nonprofit developers a year and circumvent the more commonly used requests for proposal.
News & Media
Of the 16 site authorization letters given to nonprofit groups since 2008, four letters went to U.J.O. or Ridgewood Bushwick for sites they proposed to develop, city officials said.
News & Media
They are seen by developers and city planners as both expedient and a way to augment city subsidies with outside money — but there are no rules requiring public disclosure of the authorization letters.
News & Media
He gives "authorization letters" to certain truckers to haul some banned contents across his bridge.
News & Media
For Academic Training: DS-2019 with AT authorization and letter from OIA. Original signatures are required on letters.
Academia
Expert writing Tips
Best practice
Always specify the duration or expiration date for the authorization to ensure it doesn't extend beyond its intended purpose.
Common error
Avoid using vague language that grants unlimited authority. Be specific about what the recipient is authorized to do to prevent misuse.
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "authorization letter" functions primarily as a noun phrase. It names a specific type of document that grants permission or authority to someone. Ludwig AI validates this through the given examples, showcasing the phrase's role in naming such documents.
Frequent in
Academia
30%
News & Media
40%
Science
15%
Less common in
Formal & Business
5%
Wiki
5%
Encyclopedias
0%
Ludwig's WRAP-UP
The phrase "authorization letter" is a common and grammatically correct term referring to a document that grants permission or authority. As Ludwig AI confirms, this phrase is versatile and finds usage across academic, news, and scientific contexts. When writing an "authorization letter", be specific about the scope and duration of the authorized actions to avoid ambiguity. Alternatives include "letter of authorization", "permission letter", and "approval letter", each offering a slightly different nuance. While the phrase is generally used in a professional register, it is important to avoid overly broad authorizations to prevent potential misuse. The frequency analysis suggests that "authorization letter" is most prevalent in News & Media and Academia, highlighting its importance in both reporting and formal documentation.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
letter of authorization
Reverses the order of the words in the phrase.
permission letter
Substitutes "authorization" with the synonym "permission".
approval letter
Replaces "authorization" with "approval", focusing on the act of approving.
clearance letter
Uses "clearance" to imply authorization for something specific.
license letter
Implies a formal permission or license granted via letter.
credential letter
Highlights the use of the letter as a form of credential or validation.
mandate letter
Emphasizes the letter as a formal mandate or instruction.
accreditation letter
Signifies that the letter serves as a form of accreditation.
official endorsement
Uses an abstract term for expressing the same concept.
document of consent
Rephrases the concept as a formal document indicating consent.
FAQs
How do I write an effective "authorization letter"?
An effective "authorization letter" should clearly state the purpose, scope, and duration of the authorization. Include the names of both parties involved and their contact information, and ensure the letter is signed and dated.
What should I do if I need to revoke an "authorization letter"?
To revoke an "authorization letter", send a written notice to the recipient stating that the authorization is terminated as of a specific date. Keep a copy of the revocation notice for your records.
What are some alternatives to using an "authorization letter"?
Depending on the situation, you can use alternatives like a "permission slip", a "proxy statement", or a simple "email confirmation" for less formal authorizations.
What's the difference between an "authorization letter" and a "letter of intent"?
An "authorization letter" grants permission for someone to act on your behalf, while a "letter of intent" expresses a preliminary commitment to do something, such as enter into a business deal. The first grants power, the second declares an intention.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested