How to ship a media mail package correctly?

stamps don't need tape on them, self-adhesive stamps not come off, unlike old type had moistened. putting tape on stamps, clear or not, voids them. it's put no postage on there @ all.

kind of express mail markings means express mail postage must paid. kind of priority markings means priority postage must paid. use plain, unmarked boxes , mark them 'media mail', or media mail shippers. have sealed, addressed package weighed @ post office find out correct postage. weighs more 13 ounces put own stamps on returned not mailable due security rules. take packages post office.

i put games in media mail box, , had express mail sticker on it, , 5 stamps. mailman took yesterday, returned today note attached saying: "express mail $27.40. first class 3.31. cannout put tape on stamps," clear tape though, how ship correctly?

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