A prominent short-seller just released a bombshell report on payments darling Block. Here are the 4 biggest claims.

• Hindenburg Research on Thursday released a scathing report about Block, saying it inflated metrics.
• In response, the payments company said the report was "factually inaccurate and misleading."
• Here are some of the biggest claims in the short-seller's report.

Hindenburg Research on Thursday released a scathing report on Block's Cash App platform, alleging inflated metrics, fake accounts with names like "Donald Trump and "Elon Musk," and lack of enforcement so prevalent that rappers bragged about it in hip-hop songs.