[DATE, ex. Wednesday, June 11, 2006]

[NAME, COMPANY AND ADDRESS, ex.
Robert Brown
XYZ Inc.
1234 First Street
Suite 567
Anycity, Anystate  85245]

Dear [NAME, ex. Robert Brown],

As per your request, I have enclosed a copy of our invoice #[INVOICE NUMBER].  {ENUMERATE OTHER ENCLOSURES, IF ANY, ex. I have taken the liberty of including copies of the purchase order and shipment acknowledgement slip.}  Please call me at XXX-XXXX if there is anything else I can do for you.

Sincerely,

[YOUR NAME]

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