From January 2018, companies that are authorised or registered by the Financial Conduct Authority, or another European regulator, can provide AIS or PIS.
The FCA and other European Regulators will add AIS and PIS providers to the registers they keep of all authorised businesses. These registers are publically available.
You should be aware that companies that have been providing these services since before 12 January 2016 do not need to be authorised by the FCA until the end of 2019, so may not appear on the FCA’s register until a later date.
Before you use one of these services be alert, and make sure you are confident that any organisations you share your information with are who they say they are. You should make sure that you understand the service and that you are happy with who will be providing it to you.