| 摘要 |
The invention relates to a postal envelope (1) for registered mail with receipt acknowledgement, comprising: a first flap (IA) with a first opening (2A) for introducing a document and means for closing said first opening; a second flap (IB) with a second opening (2B) for introducing a copy of said document and second means for closing said second opening; the first and second flaps (IA, IB) being connected together by removable connection means and designed to be applied against each other by removable attachment means, and a bundle of detachable self-duplicating documents each including a sender's area and an addressee area, said document bundle being provided as fixed on predetermined area of an outer face of one of said first and second flaps (IA, IB). |
