Caso Megavazamento de Dados is an information and registration platform for a proposed collective action seeking compensation for people affected by Brazil’s 2021 mass data leak. The site says the exposed database included personal details such as CPF numbers, names, addresses and phone numbers, affecting approximately 220 million individuals, as well as information about businesses. It states that the claim against the Experian group has been filed in England and that the case seeks compensation for Brazilians whose information was exposed.

The action was filed by Mishcon de Reya LLP, a law firm identified on the site as experienced in collective claims. Visitors can learn about the case, review frequently asked questions and news updates, and begin a registration process at no cost. The website also provides a portal for people who have already started registering.

It describes its content as general information for potential claimants and advises seeking legal guidance when assessing individual circumstances. The site is available in Portuguese and English and includes privacy and cookie preference controls