The European Union's Payment Services Directive 2 (PSD2) requires Strong Customer Authentication (SCA), which aims to ensure consumers can use new payment technologies safely. PSD2 introduces new rules, including direct access between merchants and customers' bank accounts, requiring stronger authentication methods like 2FA. Twilio is a leading communications platform as a service that delivers 2FA solutions that satisfy PSD2 rules and regulations, offering push authentication and customer notifications through APIs, making it easier for financial institutions to comply with the new requirements.