Have you accidentally forgotten to include a stamp on a letter before? Here's how you can send mail without a stamp.
My Teenage Son Does Not Know How To Mail A Letter – I Blame Technology – ReadWrite -- Jerz's Literacy Weblog (est. 1999)
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How NOT to send mail – the mailroom.
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How NOT to send mail – the mailroom.
Do You Need a Postage Stamp to Send a Letter - PostGrid
Business Reply Mail Services — Direct Mail, Fulfillment Services, Mailing List