Many authors wonder whether ARC readers should mention that they received a free copy. Amazon does not need a long legal note in every review, but transparency is usually a good habit.
The safest approach is simple: the reader can say they received an advance copy and are sharing an honest opinion.
Why Disclosure Helps
Disclosure makes the review feel cleaner. It tells shoppers that the reader had early access, but it also makes clear that the opinion is their own.
That is better than making the ARC process look hidden or scripted.
What Authors Should Not Do
Do not give reviewers a sentence they must copy. Do not require disclosure in exchange for the copy. Do not ask them to soften criticism because they received the book for free.
The review belongs to the reader.
A Simple Reader Note
If readers want wording, keep it neutral: "I received an advance copy and this is my honest review."
Short, clear, and not promotional.