The service provider is the provider for whom you wish to identify yourself with AUTHADA. This can be, for example, a bank (e.g. Sparkasse, LBBW), a payment service provider (e.g. Paysafecard), a telephone provider (e.g. Vodafone) or an online shop (e.g. fashionette).
If you want to identify yourself for example for a service from Paysafecard, then Paysafecard is the service provider. You can then enter the TAN generated in the AUTHADA app on the Paysafecard website.