| Word | Definition |
| AISP | Account Information Service Provider |
| AIS | Account Information Services. Services pertaining to information regarding accounts, balances, etc |
| ASPSP | Account Servicing Payment Service Provider |
| CBPII | Card Based Payment Instrument Issuer |
| Stateless | Data sent to the server is validated, but not used for the response. you may submit a payment initiation of 200 DKK, but there will be no retrievable posting on the account afterwards of 200 DKK. |
| eIDAS | electronic identification, authentication and trust services. Certificates for securing the interfaces between TPP and ASPSP. A combination of QWAC and QSEAL is used to establish a secure channel with two way authendication and non-repudiation |
| EBA | European Banking Authority |
| IBAN | Inernational account number |
| BBAN | National account number |
| NCA | National Competent Authority - In Denmark Finanstilsynet |
| PIISP | Payment Initation Instrument Service Provider |
| PIIS | Payment Initation Instrument Services |
| PIS | Payment Initiation Services |
| PSU | Payment Service User. The account holder/financial institution's customer |
| PSD2 | Payment Services Directive 2 |
| PSP | Payment Services Provider |
| PSC | Personalized Security Credentials |
| QTSP | Qualified Trust Service Provider |
| QSEAL | Qualified Certificate for Seals (Content) |
| QWAC | Qualified Website Authentication Certificate (Transport) |
| SCA | Strong Customer Authentication |
| Sunshine Scenario | The normal operation where all the parameters are correct, and there is a response to return. |
| Consent | A formal consent (specified in Berlin Group Framework) from the PSU to authorize the TPP towards the ASPSP to access account information services on behalf of the PSU. |
