Insurers are denying or limiting coverage for customers at risk from bankrupt cryptocurrency exchange FTX, Reuters reports. Now the collapse of FTX last month has heightened fears.

Lloyd’s of London and Bermuda Insurance Markets are demanding more transparency from cryptocurrency companies about their exposure to FTX. Insurers are also proposing broad policy exclusions for any claims arising from a company’s collapse.

According to Kyle Nichols, president of brokerage Hugh Wood Canada Ltd, insurers are requiring clients to fill out a questionnaire asking if they have invested in FTX or have assets on the exchange.