Some ageing to the paper as common and unavoidable due to the acidic conent of the paper used by the publisher. However, it would take a lot of effort and criminal energy to fake those signatures that accurately in the hope of turning a profit. My educated guess is that the book was signed to someone who worked on the movie himself/ herself; or to a die hard fan who must have spent a lot of time and effort collecting all of them.
Please check out my other collectible books on offer including two more Harry Potter books signed by part of the film cast including one copy signed by JK Rowling and fourteen members of the film crew; the true first editions of'Harry Potter and the Philosopher's Stone', and'Harry Potter and the Chamber of Secrets' both published by Bloomsbury (London), as well as other cult collectible first editions such as the'Lord of the Rings Trilogy'. The item "JK Rowling,'Harry Potter Order of Phoenix' SIGNED true first edition, 1st/1st" is in sale since Thursday, July 14, 2016. This item is in the category "Books, Comics & Magazines\Antiquarian & Collectable". The seller is "grogro123" and is located in Birmingham.
This item can be shipped to United Kingdom, to Austria, to Belgium, BG, HR, CY, CZ, DK, FI, to France, to Germany, GR, HU, to Ireland, to Italy, LT, LU, MT, to Netherlands, PL, PT, RO, SK, SI, to Spain, SE, to Australia, to United States, RU, to Canada, to Japan, to New Zealand, to China, IL, to Hong Kong, NO, ID, MY, to Mexico, SG, KR, to Switzerland, to Taiwan, TH.