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How to note enclosures in a letter
Close your letter.
The enclosure notation occurs after the closing and signature of your letter. Use a complimentary closing such as " sincerely " or " yours truly, " leave space for your signature, and then type your name.
Generally, your closing might be more familiar if you are on more personal terms with the recipient. For example, if you are writing to your best friend's father, you might use a more informal closing such as " kind regards " or " best wishes.