We hit this case with a customer service where each “domain” (transaction management, fidelity, auth, catalog data, etc.) was handled by a different internal or

We hit this case with a customer service where each “domain” (transaction management, fidelity, auth, catalog data, etc.) was handled by a different internal org, with an orchestrating layer on top. Having the emitting entity sign their request in a standard format that can be checked by anything having with their public key helped a lot.