| AAVS | Automatic Add Value Service |
| AIDL | Android Interface Definition Language for communication |
| FCO/ECO | Fast Checkout/Express Checkout – an option allows users to skip authentication in accorandance with merchant and Samsung Pay policy |
| Merchant | A business entity engaged in in retail e-commerce that provides an online checkout service for purchasing its products and/or services to registered end users |
| Issuer | Financial institution empowered to issue credit and/or debit payment cards to qualified consumers and businesses |
| Payment Gateway (PG) | E-commerce app service provider equipped to authorize credit card payments for e-businesses, online retailers, bricks and clicks, or traditional brick and mortar |
| Payment Token | Secure method for payment ensuring that a cardholder’s information is not exploited by unauthorized parties |
| Samsung Pay | Samsung’s proprietary mobile wallet app and payment system |
| Samsung Pay Service | The server and service components of Samsung Pay |
| Eligibility Check | A query by third-party apps to check whether or not Samsung Pay is supported/activated/ready-to-use on a Samsung device |