For example, in NRW, only phone number or email address are required (§ 8 CoronaSchVO), not both. For the purpose of data reduction you shouldn't require both from a user when they aren't legally required to provide both.
You could add a configuration for each state and let businesses select which state they are legally bound to.
Some competitive apps also allow to select from a list of required field combinations, but this requires somewhat detailed legal knowledge from business owners and is prone to mistakes.
For example, in NRW, only phone number or email address are required (§ 8 CoronaSchVO), not both. For the purpose of data reduction you shouldn't require both from a user when they aren't legally required to provide both.
You could add a configuration for each state and let businesses select which state they are legally bound to.
Some competitive apps also allow to select from a list of required field combinations, but this requires somewhat detailed legal knowledge from business owners and is prone to mistakes.