Make sure all your employees are aware of payment protocols and that any payment request is verbally verified by a trusted source.
Be extra vigilant about cybercrime, payment scams and fake emails, particularly CEO impersonation and invoice fraud. Cybercriminals will try to exploit the current situation.
Maintain appropriate physical security procedures – for example, for managing cash, empty premises and unknown contractors.
Check all website URL's to make sure they are for the intended company. Check this is different browsers if necessary.
If you get a cold call from someone who you don't know, take their number and call them back to validate it is genuine.