Amazon have announced changes to their seller feedback policy. Starting 17 May 2018, seller feedback will only be eligible for removal 90 days after it has been left (previously this was set as 365 days). There have been no changes to the grounds for removal.
Here’s the announcement:
Currently, seller feedback is eligible for removal up to 365 days after the buyer submits it. Effective May 17, 2018, after 90 days seller feedback will no longer be eligible for removal. This policy change will apply to all seller feedback, including feedback submitted prior to this announcement. Feedback removal requests must still meet all other eligibility criteria to be considered for removal.
To learn more about managing your feedback, visit https://sellercentral.amazon.com/gp/help/761