original_query: What methods do forgers use to make their forgeries appear authentic?
query: What methods do forgers use to make their forgeries appear authentic?
answer: Forgers use various methods, including using blank end papers from old books to match the paper's age, researching ink formulations of the relevant era, and even using tea or tobacco stains to age their forgeries.  They may also forge only the signature, or fabricate the entire document.