(your street city, state, zip) (date) (name street city, state, zip) Dear ____ (name): We shipped your order no. ____ (number) for ______ number and item) air express, special delivery instead of parcel post because we thought that time was a critical factor. Because our assumption was our error, we are mailing you a credit for the difference in delivery rates. Sincerely, (name) (title)
