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How to write a letter with c o

how to write a letter with c o In practice, it lets the post office know the recipient is not the normal recipient at that street address.

How is it abbreviated?


How do I use it?

Write the recipient’s name on the first line, as you do with most letters. Start the second line with “c/o” followed by the person or company name associated with the address you are using.


Business Example

It can come in handy when trying to get in touch with someone whose home address you don’t know. It can also be useful to call attention to a specific person. In this way it is like including “attention” in your address. This could be useful if you needed to send a thank you card.

Bob Smith
c/o ACME Company, Inc.
123 Street St.
City, ST 99999

Hotel Example

You can also use it to send a letter to someone staying at a hotel if you don’t know their room number.

Salutation or greeting:

1) Dear Sir or Madam,
If you do not know the name of the person you are writing to, use this. It is always advisable to try to find out a name.

2) Dear Mr Jenkins,
If you know the name, use the title (Mr, Mrs, Miss or Ms, Dr, etc.) and the surname only. If you are writing to a woman and do not know if she uses Mrs or Miss, you can use Ms, which is for married and single women.

Ending a letter:

1) Yours faithfully
If you do not know the name of the person, end the letter this way.

2) Yours sincerely
If you know the name of the person, end the letter this way.

3) Your signature
Sign your name, then print it underneath the signature. If you think the person you are writing to might not know whether you are male of female, put you title in brackets after your name.

Add how you found out about the vacancy.

Paragraph 2
Give the reasons why you are interested in working for the company and why you wish to be considered for that particular post. State your relevant qualifications and experience, as well as your personal qualities that make you a suitable candidate.

Paragraph 3
Inform them that you have enclosed your current CV and add any further information that you think could help your case.

Closing Paragraph
Give your availability for interview, thank them for their consideration, restate your interest and close the letter.

Outline: A Letter of Enquiry

A letter of enquiry is when you are approaching a company speculatively, that is you are making an approach without their having advertised or announced a vacancy.

Opening Paragraph
Introduce yourself briefly and give your reason for writing.

If you know that John and Sarah are friends, you can send an invitation intended for John to Sarah’s address. This only works if you are also inviting Sarah to the event too.

John Doe
c/o Sarah Smith
123 Street St.
City, ST 99999

Is it still used?

Care of is still mentioned in multiple USPS manual entries. Here, in the recipient services manual in section 1.1.8.h, it mentions that restricted delivery packages marked with “Care Of” can be signed by either party.

Google Trends

It’s usage appears to be constant over the last decade with some seasonality in Spring.

Google nGram

I’m not quite sure what would cause a spike between 1916 and 1920. In absolute terms, the spike is pretty small.

Google Ngram



  • No Longer With Us


    #2 19-Sep-2007, 14:50

    Re: Use of c/o in letters

    There is only one use: when a person is using another individual's address for the receipt of letters:

    Mrs J. Bloggs,
    c/o Mrs B. Smith.

    The letter is being sent into the "care of" Mrs Smith.

  • Paragraph 3
    Refer to your enclosed CV and draw their attention to any particularly important points you would like them to focus on in it.

    Closing Paragraph
    Thank them, explain your availability for interview and restate your enthusiasm for their company and desire to be considered for posts that might as yet be unavailable.

    More Help with Letter Writing

    If you want more help with how to write formal or informal letters please feel free to ask us in our Editing & Writing Topics forum. Our teachers will be able to help answer any questions you might have.


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