The abbreviation for attached is Att., a recognised short form used in document references, business notes and certain correspondence conventions. It can indicate that something has been included or connected to another item. However, Att. can also mean attachment, attention or attorney, so its meaning depends on the context.
In modern professional emails, writing attached in full is usually clearer.
What Is the Correct Abbreviation for Attached?
Att. is the best-documented abbreviation for attached. English dictionaries recognise this form, although it is not required by any universal writing standard.
| Form | Meaning | Usage |
|---|---|---|
| Att. | Attached | Short document references and administrative notes |
| att. | Attached | Same abbreviation in lowercase |
| Att | Attached | A punctuation-free variation found in some references |
The period in Att. follows the usual convention for shortened words. However, some internal systems and abbreviation lists omit punctuation.
There is no need to invent alternatives such as Attd. when the complete word is easy to write and understand.
Also, Attach. should not automatically be treated as an equivalent abbreviation for attached. It may have another meaning depending on the document or abbreviation system.
What Does Attached Mean?
Attached is the past tense and past participle of attach. It can also function as an adjective describing something connected, joined or included with another item.
Its meaning changes depending on the situation.
- Digital documents: “The invoice is attached to the email.”
- Physical objects: “The garage is attached to the house.”
- Supporting documents: “The attached report contains the updated figures.”
- Personal relationships: “She is emotionally attached to her childhood home.”
Although the complete word has several meanings, Att. is mainly useful as shorthand in document-related contexts. It is not normally used to shorten everyday phrases such as “emotionally attached” or “attached garage.”
How to Use Att. in Documents and Emails
The abbreviation is most practical in compact records where the meaning has already been established.
For example, an internal document tracker could use the following entries:
| Short Record | Meaning |
|---|---|
| Contract – att. | Contract attached |
| Signed form – att. | Signed form attached |
| Supporting files – att. | Supporting files attached |
These are illustrative internal labels, not prescribed formats. An organisation may use different terminology or simply include an attachment-status field.
In Professional Emails
Modern emails rarely need an abbreviation for attached because writing the full word adds little extra length.
Compare these examples:
Unclear: “Att. revised quotation for review.”
Clearer: “I’ve attached the revised quotation for your review.”
Another natural example: “The updated agreement is attached to this email.”
The complete sentences tell the recipient exactly what has been included and what action may be required.
For customer emails, important correspondence and formal communication, this clarity is generally more useful than saving a few characters.
Attached vs. Attachment: What’s the Difference?
Although the words are related, they have different grammatical functions.
Attached describes something that has been added, joined or included. Attachment is a noun referring to the additional item or document itself.
| Word | Example | Meaning |
|---|---|---|
| Attached | The document is attached. | Describes its status |
| Attachment | Please open the attachment. | Identifies the additional file |
| Attach | Please attach the document. | Describes the action |
This distinction matters because Att. can represent both attached and attachment in different conventions.
For example, when Att. appears below the signature of a traditional business letter, it may be a notation meaning Attachment, rather than the adjective attached.
For guidance on these document notations, see our abbreviation for attachment article, which covers the singular and plural forms used in business correspondence.
Can Att. Have Other Meanings?
Yes. One reason to avoid unnecessary abbreviations is that the same letters can represent several unrelated terms.
Dictionary references recognise att. as a shortening of:
- Attached – something included or connected.
- Attention – a notation directing correspondence to a particular person or department.
- Attorney – a legal professional.
In everyday business writing, Attn. is also a familiar abbreviation for Attention, and Atty. may be used for Attorney.
For example, “Attn: Accounts Department” directs correspondence to that department. It does not mean an accounts document has been attached.
Likewise, a short note indicating that a document was attached should not be confused with confirmation that it reached the recipient.
An email can contain an attached file without proving that the recipient has opened or reviewed it. A separate confirmation that the document was received provides information about its arrival.
When Should You Write Attached in Full?
Use the complete word whenever an abbreviation might slow the reader down or create uncertainty.
This is particularly important in customer emails, contracts, formal reports, job applications and documents shared outside your organisation.
For example, a subject line such as “Signed Agreement Attached” communicates more clearly than “Agreement – Att.”
Similarly, when sending several files, identify them by name instead of relying on a shortened label:
“The signed agreement and payment schedule are attached for your review.”
Before sending the message, make sure the files are actually included and that their names and versions match the documents mentioned in the text.
Frequently Asked Questions
Is Att. an official abbreviation for attached?
Att. is a recognised dictionary abbreviation for attached, but there is no universal rule requiring its use. It may be appropriate in short references and internal records. For general professional writing, the complete word is usually clearer.
What does Att. mean at the bottom of a letter?
At the bottom of a business letter, Att. commonly means Attachment, indicating that another document accompanies the letter. This is different from using Att. as an abbreviation for the adjective attached. The position and surrounding text determine the intended meaning.
Can I use Att. in an email subject line?
You can use it in an established internal system, but it is generally better to write attached or identify the actual document. For example, “Updated Invoice Attached” is easier to understand than “Invoice Att.”, particularly for customers and unfamiliar recipients.
Is Att. the same as Attn.?
No. Att. can mean attached, while Attn. means attention and is commonly used to direct correspondence to someone. Although dictionaries also record att. as a possible shortening of attention, Attn. is usually clearer when that meaning is intended.
Final Thoughts
Att. is a recognised abbreviation for attached, particularly in short document references and administrative notes. However, its meaning is context-dependent because the same abbreviation can represent attachment, attention or attorney. Use it when a brief label is genuinely helpful, but write attached in full when preparing professional emails, formal documents or other communication that requires immediate clarity.
