We have a couple of things in place. When an employer is running payroll: they have 2 points to review (both employee and their payroll as a whole) the totals in USD, 2FA step, and then there's a countdown before payroll begins to run (which they can opt to rush if they so decide).
We have policies and tech in place to make sure that when we're distributing we can guarantee that payouts happen as we expect.
Fraud/risk - Bitcoin itself doesn't increase our fraud/risk. We follow a KYC process for all of the companies and employees on our platform. These are companies paying employees. These companies and employees are liable for their payroll taxes and income taxes and keep records of this for them. The employees themselves are responsible for maintaining their Bitcoin wallets. We verify that a wallet has a real address, but the risk for losing money forever if they enter the wrong address is the same as if they were transferring from one of their wallets to another using any other Bitcoin service.