You may come across the below or something similar when browsing available Royal Mail services which suggests a special delivery service with £500 compensation is available.
When trying to find this service in Shiptheory, you'd only be able to find minimum compensation levels of £750.
The reason for this is that the minimum compensation levels specifically for Online Business Accounts is £750. If you have any queries about this I would recommend contacting your Royal Mail account manager or the OBA helpdesk on 03457 950 950 to discuss which services you have available to you on your OBA account.