We HAVE created the despatch note as dynamic information directly in the email. We have also created a despatch note as a page in his admin section. Both work fine.
What the client wants is to email the dynamic information as an attachment to his packing department so when it's opened in say Word it doesn't have the header information email programs create (EG from, to, subject, date etc).
When the attachment is printed it will look better for inclusion in the packaging as a despatch note for the customer.
The page in the admin section would be a good solution when printed but the cleint doesn't want the packers to have to go into the website's admin section. He wants them to just receive an email ready to print and pack.