Use the Get Account by ID endpoint to retrieve account information using exactly one of the following mutually exclusive lookup keys:

• id + idType — a customer identifier such as SSN or driver license number, depending on which ID types your program supports.
• externalCustomerId — a provider-supplied identifier.
• customerId — Galileo's internal, unique customer identifier. Because client_id has a guaranteed 1:1 relationship with externalCustomerId, this is the deterministic way to resolve a single customer. When customerId is supplied, the response also returns that customer's externalCustomerId. If the customerId does not resolve to a customer, an Invalid customer account error is returned.

Providing more than one lookup key, or none at all, returns an invalid-parameter error.

This endpoint returns customer data such as enrollment status and onboarding date as well as a list of all accounts associated with the customer. Each account includes closureDate, a UTC timestamp (YYYY-MM-DD HH:MM:SS) indicating when the account was closed. closureDate is populated when the account status is closed (C), frozen (Z), or charged off (R); it is null for open accounts.