This depends on how you're feeling. If you contact us anonymously it's really important you give us plenty of detail as we won't be able to reach you. This is particularly important if you want us to do something about the issue you raise. If you're requesting to speak to a Report and Support advisor you don't need to submit as much information. Give us your correct contact details and an advisor will get in touch and talk it through with you.
More information can be found on our Report + Support webpages.