NEGATIVE FEEDBACK I LEFT FOR sELLER HAS DISAPPEARED - WHY/HOW??

[petchimp]

How can Feedback I have left on a Sellers site have been removed/Deleted??

[plpmr]

it must have violated feedback policy, for example, you left a non-positive saying "Refund Issued as Item was held up in Customs - - " etc. that would be removed if the seller asked.