[l-Date]
To:
[r-Name]
[r-Address]
From:
[s-Name]
[s-Address]
[s-Phone]
RE: [s-Reference]
Dear [r-FName]:
Our firm has received the
above-referenced purchase order.
Unfortunately, we are unable to fill the order without inclusion of a
purchase order number.
We are requesting that you provide
us with the number for your order or issue a new purchase order for the items
you have requested.
To insure an expeditious delivery,
please respond to this request as soon as possible.
Best regards,
[s-Name]