Okay...I have limited knowledge of stamps, apart from a bit of collecting as a kid, so here goes.  Our uncle was a serious philatelist and we're just beginning to get a handle on his vast collection.

This is a USPS PS Form 3849-A customized for the Guilford Station Post Office in Greensboro, North Carolina and used as a Postage Due/Collection receipt.  It's one of SEVEN we have listed on eBay so check them all out.  Very unusual indeed.

POSTMARKED:  October 20, 1989.

TOTAL POSTAGE USED:  $3.25.

DIMENSIONS:  5" by 3-1/8".

CONDITION:  Good used condition.

Please examine all LARGE images above as they serve as part of the condition comments.

Questions?  Feel free to ask (before buying please!).