Customer Currency Change After Subscription Exists — Policy & Workarounds

Summary

Once a customer has an active subscription and/or child transactions (e.g., invoices, payments, credits) in a given currency, the customer currency cannot be changed. Attempting to edit the currency will be blocked by the application.

Example (masked):
A customer (e.g., Customer X) with an active subscription (e.g., S‑XXXXX) in GBP cannot be switched to USD because GBP transactions already exist.

Why: Currency is a foundational attribute for pricing, invoicing, AR, and revenue schedules. Changing it post‑facto would corrupt financial history and reporting integrity.