The way to check is exactly the same as checking any other financial institution in any country – check the regulator website. Regency is licensed and regulated as a Long Term Insurance Company in St Kitts & Nevis, by the Nevis Financial Services Regulatory Commission. Here are the details:
Nevis Financial Services Regulatory Commission (Nevis FSRC)
Website Link: https://www.nevisfsrc.com/regulated-entities/#long-term-insurance-companies
Search for: Regency Assurance Ltd
Section: Regulated Entities, Licensed International Insurance Entities, Long Term Insurance Companies