In the Portuguese sales site "OLX" is a postcard signed by AH, I need your help to make sure it is not fake, and is a real deal.

The link for the announcement:

https://www.olx.pt/anuncio/adolf-hit…tml#b0d51c2b7f

The translation of the described in the announcement:

"… In order not to hurt susceptibilities, I would like to point out that the acquisition of this article is not due to any ideological reasons but only, as a collector, because of its rarity and historical value.
I acquired this article from Jerry Swallow, a well-known WWII German collector of WWII material who wrote a letter of provenance attesting to its authenticity. You can easily find it on Google (Jerry + Swallow + Hitler + Auction).
21 x 15 cm - Postcard & Stationary. The document also features a white stamp of the German national eagle.
In the latest photos you can find some catalog pages for the auction # 120 of "Regency Superior’s" (experienced auctioneers since 1929), held on September 29 and 30, 2016 at the St. Louis Gallery, including some items from its impressive estate with pictures and documents signed by Hitler, Goring, Himmler, Hess, Rommel, etc.), and where he is mentioned dozens of times.
I will be able to e-mail the complete RS catalog if you wish.
Most items come from the collection of General Heinrich Jurs of the Waffen-SS and the German "Hermann Historica", which is the largest militaria auctioneer in the world and have been inspected and approved by forensic expert Frank Garo (FHE - Forensic Handwriting Expert ), as stated in the COA…"

Best Regards.,

Von River