uprate

Verb

 * 1)  To give a higher rating to.
 * 2)  To put a higher value of postage on (a letter) than required by the official rate.
 * 1)  To put a higher value of postage on (a letter) than required by the official rate.
 * 1)  To put a higher value of postage on (a letter) than required by the official rate.

Noun

 * 1) An increase in a rating