* Make-up Postage: This refers to the additional postage you need to pay when your initial postage was insufficient. It's not specific to stamps, but rather applies to any mail where the sender did not pay enough.
* Face Value: This refers to the value printed on a stamp, indicating the amount of postage it covers.
* Market Value: This refers to the value of a stamp on the collector's market, which can be influenced by factors like rarity, condition, and historical significance.
Please provide more context or details about the situation where you encountered the term "makeup rate" to clarify what you're asking. For example:
* Where did you see this term?
* What was the context?
* What kind of stamp are you referring to?
With more information, I can provide a more accurate and helpful answer.