Affiliate disclaimer and disclosure are essential under both, US law and Amazon Associates legal requirements.
Amazon strictly requires you to identify yourself as an Amazon Associate. They are very specific about this and have even provided example paragraph affiliates may copy to their website:
Thesofalove is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.
The reason Amazon is so specific about full disclosure is that the blogger or content creator develops a certain trust with its users – they follow their posts, look for their opinions and trust their reviews and recommendations.
Getting paid to write something positive about a product is not very ethical and will be considered as betraying your users. Therefore, Amazon requires you to clearly state if you’re endorsing a product out of fondness or getting something in return.
Moreover, putting this statement will also help you in abiding the FTC’s online endorsement guidelines and you’ll be able to avoid legal trouble with them.
FTC and Amazon both demand to put the disclaimer statement explicitly on the website where it’s clearly visible. You should not place it as part of the “about us” or “information” pages.
For example, displaying it prominently on the page with a product review or even next to the affiliate link is what many bloggers do. This will catch the attention of users who are about to click the affiliate link and make them aware of it.
The language used to state the “affiliate link” should be clear and obvious. It should mention that the website is being compensated for putting up the affiliate link
I may earn a small commission for my endorsement, recommendation, testimonial, and/or link to any products or services from this website.
To sum it up – anyone who is part of the Amazon Associates program and earns money through it should put a disclaimer on their website which should be available all the time. In case of non-compliance, Amazon can close your account so why risk losing your hard-earned commission over such small detail.
Placing a full version of the disclaimer at the bottom of the site or within your other legal pages is also a good idea to ensure you cover all other aspects of running a website and not just the affiliate part of it.