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"Not Onus"

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Diagram of an Onus installment transaction flow between POS and HOST

Payment Systems

What are the key points in an Onus Installment project?

Before describing the Onus Installment process, it is better to first answer: what is an Onus transaction? An Onus transaction is when the acquirer and issuer are the same institution, so the transaction is processed through that institution.

Diagram illustrating an Onus payment transaction between card and POS

Merchant & POS

What does Onus mean?

In the payment systems glossary, some terms are essential, including Onus. Onus literally means "on us" and refers to cases where the card-issuing bank and the POS/ATM bank are the same, meaning no clearing commission applies.

Diagram illustrating a Not Onus transaction between the issuer and acquirer

Merchant & POS

What does Not Onus mean?

Not Onus is a payment systems term meaning "Not On Us": a situation where the card-issuing bank and the POS/ATM (acquiring) bank differ. Such transactions are settled through clearing between the two banks.

Diagram showing how an open authorization moves to a card statement after batch close and clearing

Credit Card

What Is an Open Authorization?

In credit card transactions made through a POS, receiving approval alone is not enough for the transaction to post to the card's statement period; settlement must also take place. The settlement period, known as the open-authorization waiting time, varies by transaction type.

Diagram illustrating the card authorization process

Merchant & POS

What Happens During Authorization?

Today, credit cards play an important role in our daily lives. We can carry out almost all of our transactions without carrying cash, using our credit card instead. During a purchase, we hand our card to the cashier and enter our PIN at the POS terminal.

Illustration representing credit card loyalty points and rewards

Merchant & POS

What are Loyalty Points?

Loyalty points are promotional rewards banks give customers for credit card transactions, tracked on a card/customer basis. Banks charge merchants a commission on POS transactions, and some share part of that commission with cardholders as points.

Diagram of basic payment systems terminology including issuer, acquirer, and authorization

Payment Systems

Basic Terms Used in Payment Systems

Although many important terms are used in payment systems, the expressions below are its cornerstones — the ABCs of payment systems, so to speak. Issuer: the credit card company, usually a bank, that issues the card and tracks debt, credit, bonus points, and other services for the customer.

Diagram illustrating a bank's OnUs transaction flow and the process of opening ATMs to other banks' cards

ATM

What needs to be done to open ATMs to the use of all bank cards?

Suppose you are a newly established bank, wanting to offer customers all your products and services. Of course, this is not easy. First, the Bank's OnUs transaction processing step must run successfully before other banks' cards can be accepted at the ATMs.

Diagram showing an authorized card transaction that expires before reaching the clearing file

Credit Card

What does it mean for a card transaction to expire?

Due to how payment systems work, authorization is obtained for a transaction first. For a Not Onus transaction (different card and POS banks), the system waits for it to arrive via the clearing incoming file. If it does not arrive within about a week, the transaction expires.

Diagram illustrating clearing types between card-issuing and POS banks

Clearing

What are the Clearing Types?

In card transactions via POS/ATM, when the card-issuing bank differs from the POS/ATM bank (Not Onus), the transaction is subject to clearing. Below, POS can also mean ATM. Is the clearing system a single type? No...

Merchant and bank settlement process for POS transactions

Merchant & POS

How do banks work with merchants?

After a merchant applies to a bank and the required checks on the company are completed, a POS is connected to the customer. Settlement can be commission-based, held for a period, or both, depending on the agreement.