Original Vs. Reprint

Hello
What is the difference between a "real" stamp and a reprint?
Maybe an ignorant question.

A reprint is when they reprint the stamp with the original plates, an authorized reprint is a real stamp.Now as for the unauthorized one, I willl leave it to other members as it's a wide subject.

As an Austrian stamps colector, I found reprints quite interesting and chalenging.

Courtesy of "Askphil"

Reprint: 1: stamps printed from the original plates after the issue has become demonetized or obsolete; usually reprints
have a distinguishing feature so that the difference can be seen 2: USPS uses term for a stamp with the same
denomination and design as previously issued, not reproduced on the same plates. 3: Nachdruck (Ger.) , Réimpression
(Fr.) , Ristampa (It.), eimpressión (Sp.) Reproductions: stamps made from a new plate to imitate the original issue as the
U.S. Special Printing issue of 1875.

Thank you.
Since you are from Austria, maybe you can answer the unanswered part of my question here:
https://goscf.com/t/52660

Glossary is link at upper left of SCF screen (under navigation). It has a definition of 'reprint'.
Don

The reason I asked is that there was a discussion in one of the forums, wether particular stamps are forgeries or reprints, and I wondered why they asked it that way and not wether it was real or forged.

Official (authorized) reprints are collectible, they are described and valued in Michel with the abbreviation "ND" (Nachdruck, Neudruck) before numbers. Scott editors usually chose not to be interested in reprints, essays and other "non-postal" items.

Contemporary forgeries made to defraud postal authorities and used on mail can be very valuable.

Most of the time, though, forgeries are worthless, unless they were produced by famous forgers, such as Fournier and Spiro, in which case there are people who collect them. In some countries (notable, in Heligoland and early Iran) forgeries were made using original plates, are difficult to distinguish, and flood the market, being much more numerous than original stamps.

And then there are modern replicas, usually marked as such on the back.

I'm not from Austria, ( check under my avatar ) I collect Austrian stamps from 1850 to 1907, stampless cover befoe 1850 , austian stamps used in Hungary and revenues. so I can't reply to your question