السلام عليكم
The proposed method to check the authenticity of a signature is as follows:
1. Analyze the handwriting of the signature carefully for any signs of alteration or inconsistencies. This includes looking at the spacing, pen pressure, length, size, and any other noticeable changes between the letters in the signature.
2. Examine the paper itself for any telltale signs that may indicate a fake signature. Specifically, check for faint grease stains, watermarks, smudges, or fibers which may have been left behind from a duplicate signature transfer.
3. Perform document examination tests such as UV light tests, microspectroscopy, ink analysis, and chemical analysis to further verify the authenticity of the signature.
4. Contact other experts or customers to determine if they can provide any insight into the authenticity of the signature.
5. Utilize any available reference signatures if they exist, to compare the shape, size, style, and spacing of the signature in question.
6. Lastly, use artificial intelligence and deep learning technologies to create an automated system for determining whether a signature is genuine or not. This system could be trained by manual signature analysis, documents, and past reference signatures.
Best regards,
Giáp Văn Hưng