Final answer:
The notation 'Enclosure' is used to indicate that additional items such as a resume or writing sample are included with a letter, and these should be listed under the 'Enclosures' section which is placed below the sender's typed name.
Step-by-step explanation:
The notation used to indicate something is stapled or clipped to a letter is referred to as an enclosure.
The proper way to signify that additional items are included with your letter is to list them under the header 'Enclosures' which appears one line below your typed name at the end of the letter.
An enclosure can be any additional document, such as a resume, a writing sample, or any other supplementary material.
It's crucial to ensure you have permission to share any enclosed work if it was done for a company.
The word Enclosures serves to notify the recipient that there are additional documents to be reviewed.