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
upon invitation
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase 'upon invitation' is correct and usable in written English.
You can use it when someone has received an invitation, either formally or informally, to an event or gathering. For example: We decided to attend the meeting upon invitation.
✓ Grammatically correct
News & Media
Science
Formal & Business
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
20 human-written examples
My advice for guests is: Become a guest only upon invitation.
News & Media
He later moved to Montreal, Author's great-grandfather migrated to Cincinnati, Ohio, upon invitation of his wife's cousin, George DeGolyer.
News & Media
Upon invitation from the military government, Perón returned to Argentina for a short time in November 1972.
Encyclopedias
To become a Forrest Guardian, after a 200-hour foundational teacher training in 2006, Ms. Mather completed 400 hours of field work, a nine-day advanced teacher training and, upon invitation, a one-week Forrest Yoga mentorship training last year with Ms. Forrest.
News & Media
Access to use Cameos is only available upon invitation.
News & Media
If visiting someone's home upon invitation, bring a gift (flowers or a present from your home country are safe bets).
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
40 human-written examples
The standard invitation, shown in additional file 1, was based upon invitations commonly used to invite people for diabetes and coronary heart disease screening [ 21].
Science
Conducting a field experiment, Eriksson and Rooth ([2011]) find that Swedish employers do not take past unemployment of young applicants as a negative signal when deciding upon invitations to job interviews.
Among other places, including BBC premises, the alleged offences occurred in hospitals (where he volunteered as a porter), schools (upon invitations related to the Jim'll Fix It TV show) and prison facilities.
Wiki
The blood taking will be organised centrally at the LUMC upon invitations.
Science
NASA would do well to resist the temptation to act upon the invitation inherent in the words of Dr. Michael Malin, who heads the Global Surveyor imaging team.
News & Media
Expert writing Tips
Best practice
When using "upon invitation", consider including details about who extended the invitation or the context in which it was given, this provides additional clarification.
Common error
Be careful not to confuse "upon invitation", which means someone is present because they were asked, with scenarios where someone is compelled to be somewhere against their will. Ensure the context makes it clear the person was willingly invited.
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "upon invitation" functions as a prepositional phrase modifying a verb or noun, indicating a condition or reason for an action. Ludwig AI analysis confirms its correct and usable form in English.
Frequent in
News & Media
35%
Science
35%
Formal & Business
15%
Less common in
Wiki
10%
Encyclopedias
3%
Reference
2%
Ludwig's WRAP-UP
In summary, "upon invitation" is a grammatically sound and frequently used prepositional phrase to express conditionality based on receiving an invitation. As Ludwig AI confirms, the phrase is correct and usable in a wide range of contexts. It is most common in news media, scientific publications, and formal business communications. Related alternatives, such as "by invitation" and "when invited", offer slight variations in emphasis. When using this phrase, ensure it is clear that the person's participation is dependent on having been asked and clarify who extended the invitation for better understanding.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
by invitation
Slightly more concise and direct.
on being invited
More emphatic about the act of inviting.
when invited
Focuses on the timing of the invitation.
at the invitation of
Highlights the inviter.
having been asked
Passive voice construction.
as a guest
Emphasizes the role of the invited person.
by request
Indicates a formal solicitation.
with an invite
Informal phrasing.
when called upon
Suggests a specific need or request.
per invitation
More formal and less common.
FAQs
How can I use "upon invitation" in a sentence?
You can use "upon invitation" to indicate that someone is participating or attending an event because they were invited. For example, "He attended the conference upon invitation from the organizers."
What's a more formal way to say "upon invitation"?
While "upon invitation" is already quite formal, you could say "at the invitation of" to emphasize who extended the invitation. For example, "The ambassador visited the country at the invitation of the president."
Are there any synonyms for "upon invitation" that I can use?
Yes, you can use alternatives like "by invitation", "when invited", or "as a guest" depending on the context.
Is it correct to say "on invitation" instead of "upon invitation"?
While "on invitation" might be understood, "upon invitation" is the more standard and grammatically accepted phrasing. It's generally better to stick with "upon invitation" for clarity and formality.
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
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested