I've seen ebay accept regular ($7.50) PDF authentications from A4U. All their authentications state authenticity (or not) on a PDF form which ebay accepts. It's possible it depends on the person who reviews the claim but it's not always necessary to pay for the long form.Also, authenticate4u charges $30 for Hermes authentication but charges $150 for anything in writing that could be used for a dispute. So for disputes, Bababebi is not significantly more expensive and very good (and prompt).