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Out of all the British vs. American spelling differences I discuss with my students, “acknowledgement” versus “acknowledgment” comes up more often than you’d think. It’s not just a regional quirk — it’s one of those pairs where either spelling is technically correct, but your choice tells readers something about whether you’re writing for a UK or US audience.
I’ll break down when each spelling is right, show you a quick test to pick the correct one for your audience, and explain why this difference exists in the first place. By the end, you’ll feel confident using either version — and you’ll understand why both are acceptable.
Key Takeaways
- Both spellings are correct — it’s a British vs. American regional difference, not a mistake.
- Acknowledgment (US) — preferred in American, Canadian English, and increasingly online.
- Acknowledgement (UK) — traditional in British, Australian, South African, and Indian English.
- The rule — when a suffix starts with a consonant, British English keeps the silent ‘e’; American English drops it.
- Choose your audience — stay consistent throughout your document and match your reader’s dialect.
Acknowledgement vs. Acknowledgment: Core Definitions
Acknowledgment
Acknowledgment is the American spelling. It’s the noun form of “acknowledge” — meaning the act of recognizing, admitting, or showing appreciation for something. It’s used the same way regardless of the spelling, just written this way in US, Canadian, and some online publications.
Example 1: She sent an acknowledgment of receipt within 24 hours of getting the package.
Example 2: The company issued a public acknowledgment of the error and promised refunds.
Example 3: My professor asked for an acknowledgment of all sources in the research paper.
Acknowledgement
Acknowledgement is the British spelling. It means exactly the same thing as “acknowledgment” — the act of recognizing, admitting, or showing appreciation. The extra ‘e’ follows a traditional British English rule about keeping the silent ‘e’ before certain suffixes.
Example 1: She sent an acknowledgement of receipt within 24 hours of getting the parcel.
Example 2: The company issued a public acknowledgement of the error and promised refunds.
Example 3: My professor asked for an acknowledgement of all sources in the research essay.
The Silent ‘E’ Rule: In British English, when you add a suffix that starts with a consonant (like -ment ) to a word ending in ‘e’ (like acknowledge ), you keep the ‘e’. American English simplified this rule and drops the ‘e’. Same word, same meaning — just different traditions.
Why Two Spellings Exist
Both spellings come from the same root verb: “acknowledge.” But when you add the suffix “-ment” to form a noun, British and American English took different paths centuries ago.
| Feature | Acknowledgment (US) | Acknowledgement (UK) |
|---|---|---|
| Spelling | No ‘e’ before -ment | Keeps the ‘e’ |
| Countries | USA, Canada, online | UK, Australia, India, South Africa |
| Example | “Letter of acknowledgment” | “Letter of acknowledgement” |
| Frequency | Increasingly common globally (digital default) | Traditional in formal Commonwealth writing |
| Meaning | Identical — recognition or admission | Identical — recognition or admission |
Which Should You Use?
The answer depends on your audience and context. Here’s the simple rule:
- If you’re writing for a **US audience** or using American English style guide (AP, Chicago, or APA), use **acknowledgment** (no ‘e’).
- If you’re writing for a **UK, Australian, Indian, or South African audience**, use **acknowledgement** (with ‘e’).
- If you’re writing for a **global or online audience** and have no specific regional requirement, **acknowledgment** (US) is increasingly the default because so much online content is written in American English.
- **Most importantly**: pick one and stay consistent throughout your entire document.
In academic papers, always check the style guide your institution requires — American colleges typically expect “acknowledgment,” while British and Commonwealth universities expect “acknowledgement.”
Acknowledgment vs. Acknowledgement in Professional Contexts
Legal Documents
In contracts and legal paperwork, you’ll see both spellings depending on the jurisdiction. American lawyers write “acknowledgment of signature,” while British solicitors write “acknowledgement of signature.” The legal meaning is identical — a formal statement that someone has received and understood a document.
Example (US legal): “The seller’s acknowledgment of receipt is required before payment.”
Example (UK legal): “The seller’s acknowledgement of receipt is required before payment.”
Business Correspondence
In emails and business letters, many companies use “acknowledgment” as the default because it’s shorter and increasingly universal in international business. However, if your company operates primarily in the UK or Commonwealth countries, “acknowledgement” is standard.
Example (formal email): “Thank you for your email. This is to confirm my acknowledgment of your request.”
Academic Papers and Dissertations
Universities require different spellings depending on their location. Most American universities want an “Acknowledgments” section (plural, no ‘e’), while UK universities typically ask for an “Acknowledgements” section. Always check your institution’s style requirements before writing.
Common Mistakes and Corrections
✗ Incorrect (mixing spellings): We need the customer’s acknowledgement before we send the acknowledgment letter.
✓ Correct (consistent US spelling): We need the customer’s acknowledgment before we send the acknowledgment letter.
✓ Correct (consistent UK spelling): We need the customer’s acknowledgement before we send the acknowledgement letter.
Why: Inconsistent spellings look careless, even though both are technically correct. Pick one style and stick with it.
✗ Incorrect: The professor requested acknowledegment of sources.
✓ Correct: The professor requested acknowledgment of sources.
Why: This is a genuine spelling error — neither British nor American English spells it as “acknowledegment”.
Jamie (American writer): Should I use “acknowledgment” or “acknowledgement”?
Alex (British editor): It depends on your audience. I’d use “acknowledgement” with the ‘e’.
Jamie: But I’ve seen both in published articles. Is one wrong?
Alex: No — both are correct. “Acknowledgment” is American, “acknowledgement” is British. Just pick one and be consistent. Publishers usually enforce one style throughout a document.
Jamie: So if I’m writing for a US magazine, I should use “acknowledgment”?
Alex: Exactly. Match your publication’s house style. Most American publishers use no ‘e’, but British ones keep it.
The “Silent E” Dropping Rule in Other Words
This British-vs-American difference shows up in other word pairs too. If you understand the pattern, you can predict the right spelling for your audience:
| Word | British | American |
|---|---|---|
| acknowledge + -ment | acknowledgement | acknowledgment |
| judge + -ment | judgement | judgment |
| abridge + -ment | abridgement | abridgment |
| lodge + -ment | lodgement | lodgment |
In each case, British English keeps the silent ‘e’ to preserve pronunciation, while American English drops it for simplicity. Once you spot the pattern, these spelling differences become predictable.
Frequently Asked Questions
Is “acknowledgement” correct in American English?
Technically yes, but “acknowledgment” (without the ‘e’) is strongly preferred in American publications, newspapers, and formal US writing. If you’re writing for a US audience, you should use “acknowledgment.” British and Commonwealth writers would choose “acknowledgement.”
Which spelling is more common internationally?
“Acknowledgment” (American spelling) is increasingly dominant online and in global communications because much internet content originates in the US. However, in academic publishing and Commonwealth countries, “acknowledgement” remains the standard. For maximum clarity, match the spelling to your reader’s region.
If I use the “wrong” spelling, will it be marked as incorrect?
Only if you’re writing in a specific regional context where one is expected. In American classrooms and workplaces, teachers and editors will mark “acknowledgement” as incorrect because American English requires “acknowledgment.” Conversely, UK teachers would mark “acknowledgment” as wrong. Always follow your institution’s or publication’s style guide.
Can I use both spellings in the same document?
No — it will look like careless editing or inconsistent proofreading, even though both spellings are technically valid. Professional writing demands consistency. Choose your audience first, then pick the spelling that matches their region, and use it throughout.
Which spelling does Microsoft Word recommend?
It depends on your spell-checker’s language setting. If you set Word to “English (United States),” it will flag “acknowledgement” as a spelling error and suggest “acknowledgment.” If you use “English (UK),” the opposite happens. Make sure your software matches your intended audience.
Related Articles
- ↑ Master Pillar: English Grammar
- Accept vs. Except — sound-alike words that trip up learners
- ↑ Back to pillar: English Confused Words (Pillar)
Quick Quiz
- Fill the blank: “I received your email and want to send an _________ that I have your request.” (acknowledgement / acknowledgment / both are acceptable for different audiences)
- Which spelling should you use when writing for a British publication? (acknowledgement / acknowledgment)
- Which spelling is standard in American English? (acknowledgement / acknowledgment)
- Is it wrong to use “acknowledgement” in American writing? (yes, always wrong / no, but “acknowledgment” is preferred / it depends on context)
- Which of these words follows the same British-vs-American ‘e’ rule? (judgement/judgment / surprise/surprize / receive/recieve)
Answers: 1. both are acceptable for different audiences (acknowledgment for US, acknowledgement for UK) · 2. acknowledgement · 3. acknowledgment · 4. no, but “acknowledgment” is preferred (both are valid, but style consistency matters) · 5. judgement/judgment
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