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
certify
Grammar usage guide and real-world examplesUSAGE SUMMARY
'certify' is a perfectly valid word used in written English.
You can use 'certify' to mean to confirm officially or to provide evidence that something is true or genuine. For example, "The government certified that the applicant was a valid legal resident."
✓ Grammatically correct
News & Media
Formal & Business
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
60 human-written examples
They examined the share prices of 762 firms, 688 of which had to certify by August 14th and 74 that certified voluntarily, seeking out any impact of certification or non-certification.They found crucial differences between the 738 firms that provided a pro-forma certification, the 15 that certified using their own words and caveats, and the nine that failed to certify at all.
News & Media
"I know the argument that you persuade Auntie Doris to take her life because then you inherit the money, but you've got to have two doctors to certify that you are mentally competent and you are making a rational, well-informed decision on your own, without persuasion," he says.
News & Media
Lord Judge said the court of appeal had refused to certify that a point of general public importance was involved in the appeal.
News & Media
These amendments would require the top US intelligence official to certify the implementation of the new phone-records regime; demand notification of changes made by telecoms companies to the kinds of call records they generate; and revise the creation of a new public-interest advocate before the Fisa court, which currently only hears from the government.
News & Media
With at least half the world's fisheries under threat from overfishing, the MSC needs to keep expanding its catchment area of protection - even if it cannot certify perfection.
News & Media
By accepting our Terms of Service and activating a listing, you certify that you will follow your local laws and regulations.
News & Media
In particular, E&Y will argue that one of the board's rules, FAS 140, allowed it to certify Repo 105 the way it did.
News & Media
Last week, the National Forensics Bureau began to certify brides' virginity for a fee.
News & Media
He insists that he has no more secrets to tell, and that Unscom's refusal to certify so is just an American-inspired plot though weapons experts from many countries back Unscom in this, including those whose governments have been most prepared to give Mr Hussein the benefit of any doubt.
News & Media
Last month, the regulator required mutual-fund executives to certify the accuracy of their financial statements, as corporate executives were required to do under the Sarbanes-Oxley act, passed last year.
News & Media
First, rules requiring better internal monitoring for potential fraud by a company's board and executives, including making the people at the top certify the quality of their firm's financial reports.
News & Media
Expert writing Tips
Best practice
When writing about formal processes, such as audits or legal attestations, prefer "certify" over more informal alternatives like "confirm" or "verify".
Common error
Avoid using "certify" in casual conversation or informal writing where simpler terms like "confirm" or "verify" would be more appropriate. "Certify" carries a tone of official validation.
Source & Trust
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The primary grammatical function of "certify" is as a transitive verb. It requires a direct object, indicating what is being attested to or confirmed. Ludwig confirms the word is used to attest to as the truth or meeting a standard.
Frequent in
News & Media
60%
Formal & Business
20%
Science
10%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
The term "certify" functions as a transitive verb, typically used to formally attest or confirm the accuracy or validity of something. As per Ludwig, "certify" means to attest to something as true or meeting a standard. It is commonly found in news, business, and formal contexts, carrying a tone of official validation. While grammatically correct and frequently used, "certify" should be avoided in casual settings where simpler alternatives like "confirm" or "verify" suffice. Top authoritative sources utilizing "certify" are The Economist, The Guardian, and The New York Times, among others.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
attest to
Focuses on providing evidence or testimony to the truth of something, emphasizing personal assurance.
attest
Similar to "attest to" but can also simply mean to declare something is true.
verify
Highlights the process of confirming the truth or accuracy of something, often through investigation.
validate
Emphasizes the establishment of legitimacy or correctness, frequently in a formal or official context.
authenticate
Concerns confirming the genuineness or origin of something, especially documents or artifacts.
confirm
Signifies the action of establishing something as true or certain, often after doubt or investigation.
endorse
Implies supporting or approving something, often publicly and officially.
vouch for
Involves giving personal assurance or guarantee about someone or something.
accredit
Specific to officially recognizing or authorizing an institution or program.
license
Focuses on granting official permission to do something, such as practice a profession.
FAQs
How can I use "certify" in a sentence?
You can use "certify" to indicate that something has been officially confirmed or validated. For example, "The auditor will "certify" the financial statements."
What's the difference between "certify" and "verify"?
"Certify" implies a formal attestation or guarantee of accuracy, often by an authority. "Verify", on the other hand, simply means to check or confirm the truth of something without necessarily involving official endorsement.
What are some alternatives to "certify"?
Depending on the context, you can use alternatives like "attest", "validate", "authenticate", or "confirm".
When is it appropriate to use "certify"?
Use "certify" when referring to an official process or declaration of truth or accuracy, such as a certification process, a legal attestation, or a formal verification.
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
88%
Authority and reliability
4.5/5
Expert rating
Real-world application tested