postpaid

adj

1. (not-comparable, usually)Having the cost of postage already paid or included in the price.
2. (not-comparable)Paid after the service (used especially of cellular phones).

adv

1. (not-comparable)With the cost of postage already paid or included in the price.

   “The complete words and score … can be supplied by Dick & Fitzgerald, post-paid, on receipt of $2.00.”