Amazon (and other affiliate vendors) require you to disclose your website’s affiliate relationship.
Failure to do so may result in a permanent ban from the Amazon affiliate program.
And not just affiliate vendors, but FTC also requires you to include an affiliate disclosure on your website. This is to ensure that visitors are fully aware of the relationship between your website and the vendor.
FTC requires that your disclosure is clear and conspicuous. And placed as close as possible to the affiliate link.
WP Legal Pages helps you generate a clear affiliate policy as well as an affiliate disclosure that’s automatically appended to your affiliate reviews and promotional articles.