[DATE, ex. Monday, March 31, 2008]

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

Dear [NAME, ex. Link Building],

On [DATE, ex. June 5], we submitted our purchase order #[PURCHASE NUMBER] for [PRODUCT(S), ex. 3 Magnaflux A5 compressors].  Although [we requested / you estimated] delivery by [DATE, ex. June 20], [REASON, ex. changes in our forecasts] have caused us to require the shipment by [DATE, ex. June 15].

We understand that this request may place some burdens on your schedule.  For that reason, your accommodation would be greatly appreciated.  Please contact me at XXX-XXXX if this is not possible.

We look forward to continued business together.

Sincerely,

[YOUR NAME, ex. Jill Jones]