Handling Proof of Address Requests

We will be more consistently requesting proof of address when we detect conflicting location signals in a user's KYC/KYB.

If using the API, you can tell if a customer needs to submit proof of address by looking at the endorsements section of a customer response, where the requirement will show up as missing

{
  "endorsements": [
    {
      "name": "base",
      "status": "incomplete",
      "requirements": {
					...
          "missing": {
            "all_of": [  
              "proof_of_address",  
              ...  
            ]
          },
          ...
      },
    },

To submit a proof of address document via API, include documents in your customer put/post request body, with an entry where the purpose is proof_of_address