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
have proof of something
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "have proof of something" is correct and usable in written English.
You can use it when you want to indicate that you possess evidence or documentation supporting a claim or assertion. Example: "To complete your application, you must have proof of something, such as your identity or residency."
✓ Grammatically correct
News & Media
Wiki
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
2 human-written examples
When you're in that situation you may have proof of something, but the trick is not to assume you have the truth.
News & Media
"Also I'd win a Nobel Prize because we'd have proof of something that only has been rumored to exist for centuries -- I'd make the million back".
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
"As long as they have proof of who they are, I don't think that we would object to something like that".
News & Media
"I have proof of that.
News & Media
They have proof of that".
News & Media
"How would he have proof of address?
News & Media
"Do I have proof of that?
News & Media
Must have proof of health insurance available.
Academia
Heck, I have proof of that.
News & Media
We and FIFA have proof of this.
News & Media
"We have proof of that," she said.
News & Media
Expert writing Tips
Best practice
When using "have proof of something", ensure the context clearly indicates what kind of proof is being referred to (e.g., documents, data, testimony).
Common error
Avoid using "have proof of something" if the evidence is weak or circumstantial. Opt for phrases like "suggests" or "indicates" if the evidence is not conclusive.
Source & Trust
84%
Authority and reliability
4.3/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "have proof of something" functions as a verbal phrase indicating the possession of evidence to support a claim or assertion. This is supported by Ludwig's assessment that the phrase is correct and usable. Examples from Ludwig illustrate its usage in various contexts, ranging from personal relationships to scientific claims.
Frequent in
News & Media
60%
Wiki
20%
Science
20%
Less common in
Formal & Business
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
The phrase "have proof of something" is a grammatically correct phrase used to indicate that one possesses evidence to support a claim. Ludwig confirms its usability in written English. Although the phrase appears relatively infrequently, its usage spans across various contexts, including news, general knowledge, and scientific discussions. When using the phrase, it is important to ensure that the context clearly specifies the kind of proof being referenced and that the evidence is indeed strong enough to warrant such a claim. Alternatives like "possess evidence of something" or "have substantiation for something" can be used depending on the specific nuance intended.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
possess evidence of something
Replaces "have proof" with "possess evidence", maintaining a formal tone.
have substantiation for something
Substitutes "proof" with "substantiation", suggesting a more rigorous form of evidence.
have documentation for something
Focuses on the presence of documented evidence.
can demonstrate something
Shifts the focus to the ability to show or prove something.
have verification of something
Highlights the aspect of confirmed or verified information.
hold confirmation of something
Emphasizes possessing something that confirms a claim.
have validation of something
Indicates that something has been officially validated or confirmed.
have a basis for something
Suggests having an underlying reason or foundation supported by evidence.
have grounds for something
Similar to "have a basis", but implies more formal or legal reasons.
have assurance of something
Implies a guarantee or strong indication, though not necessarily concrete proof.
FAQs
How can I use "have proof of something" in a sentence?
You can use "have proof of something" to indicate that you possess evidence supporting a claim, for example: "To complete your application, you must "have proof of something", such as your identity or residency."
What are some alternatives to "have proof of something"?
Alternatives include "possess evidence of something", "have substantiation for something", or "have documentation for something" depending on the context and desired level of formality.
Is it better to say "have proof of something" or "have evidence of something"?
Both phrases are correct, but "have proof of something" implies stronger, more conclusive evidence. "Have evidence of something" might be preferred when the supporting information is less definitive.
What does it mean to "have a proof of concept"?
To "have a proof of concept" means you have demonstrated that an idea or design is feasible and has practical potential. It’s not full implementation but rather initial evidence that "something is possible".
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
84%
Authority and reliability
4.3/5
Expert rating
Real-world application tested