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This lexicon is intended to help you find the definitions of the most common acronyms and expressions at SlimPay.






The collection of the monetary values underlying the Payment Transactions, reconciliation and settlement services, executed on the Payment Account.


The Application Programming Interface (API) that enables you to create orders, payments and more. 

Automatic Retry


SlimPay feature that enables you to automate the replay and recovery of failed payments.



B2B Transaction scheme between companies through SDD.



Card alias (or card token) A card alias is created thanks to a tokenization process.  The PAN data is replaced with a surrogate value known as a unique “token” or “alias”.

Card payment

Payment made by entering credit card details on the Checkout. 


Process of debiting the merchant payment account to credit the cardholder account following a claim. A chargeback is initiated by the cardholder bank and it is the bank's duty to determine if the claim is reasonable or not.


The SlimPay interface that enables debtors (customers) to sign documents or mandates and to make payments.

A person or a company that is a client of the merchant.

The client may also be referred to as the customer.

The client is referred to as the subscriber in the SlimPay Rest API. 


Transaction scheme between companies and individuals through SDD.


It is the company that has an account with SlimPay. It is the creditor that undertakes transactions on the debtor (consumer).

Creditor reference

The creditor reference is the unique identifier of your SlimPay account in our system.

Creditor ID

The unique identifier of a creditor in the SEPA zone. In order to open an account at SlimPay, a creditor needs to have a Creditor ID first.



Dashboard It is the management tool provided by SlimPay, on which you can monitor all your transactions. The first version was called Back Office.
Debtor It is the client of the creditor, also called consumer or customer.



Electronic Signature

An electronic signature is an electronic indication of a person’s intent to legally agree to the content of a document or a set of data to which the signature relates.


If your company holds one or more subsidiaries, you may want your payment flow to be divided by legal entity. Each entity will have its own reference in our system which has to be communicated along with the creditor reference already representing the holding company.



IBAN The IBAN stands for International Bank Account Number. It is the unique European identifier of a bank account. It contains information regarding the country, the bank, the agency, the account and some control digits.
Issuer (Issuing Bank) The issuing bank is the bank of the customer that has issued its payment means as its payment card.



Label The reference that appears on the debtor's bank statement. SlimPay uses the Merchant Label, if the merchant does not enter a Label, then the Company Name will be used.




Authorization given by a debtor to be debited by a merchant. The mandate format differs from one payment scheme to another. 

Merchant A company having a SlimPay account and using the SlimPay solution. We can also refer to the merchant as the creditor.





This is the list of orders that has been created through the API. An order represents a web transaction via the Checkout.


Payment scheme

A payment scheme is a set of rules and technical standards for the transactions using the underlying payment system.

Depending on its contract, a SlimPay merchant may be able to access different payment schemes such as SEPA Direct Debit Core, SEPA Direct Debit B2B.

SlimPay also supports card schemes as CB, Visa, Visa Electron, MasterCard and Maestro.


To support creditors’ recurring business, they can set up a payment plan in the Dashboard, with a frequency (monthly, tri-monthly, yearly, etc.), an amount and a period of validity.

Processing services

A process that consists of preparing a file and gathering all the orders for the bank.



Remittance files A csv file used to create orders (SDD, SCT, mandate imports, etc.).  
Reporting A reporting allows you to have all your transaction information summarized in one document.
Reserve The reserve is an amount of money that will be used to cover any potential R-Transactions. The reserve is held on the SlimPay account of the merchant and is composed of a fixed reserve and a variable reserve.
R-Transactions In SEPA Direct Debit, these are unsuccessful transactions called R-Transactions.



SEPA Single Euro Payments Area, comprising 34 countries.
SEPA B2B Direct Debit (SDD B2B) An optional payment scheme that enables a merchant to debit its corporate clients in Euros. This payment scheme may not be appropriate for all use cases as it is not implemented by every bank and the SEPA B2B mandate must be validated by the debtor's bank. 
SEPA Core Direct Debit (SDD Core) A payment scheme that enables a merchant to debit clients (both corporate and individuals) in euros.
SEPA Credit Transfer (SCT) A payment scheme that enables a merchant to transfer money in euros from an account in a SEPA country to another account in a SEPA country.
SFTP A SFTP (SSH File Transfer Protocol) is a network protocol that provides file access, file transfer, and file management over any reliable data stream.
Subscriber reference

As a payment solution, our system isn't an ERP like SAP ERP, a CRM like Salesforce or an RBM like Zuora.

We still offer a very basic, yet powerful, payment-to-customer relation via the subscriber reference parameter. This value must be provided by you and it should be unique per customer.

Even if you allow guests to pay in your application, you must provide the subscriber reference. In this case, you can generate a random unique identifier to ensure the same reference is never used twice for two different guests.

You will need to find this reference when looking for mandates, payments and other reports to help you link data in our system to data in your system.



Unique Mandate Reference (UMR)

A reference, unique to a SEPA mandate, that serves as the main mandate identifier in the SEPA Core Direct Debit and SEPA B2B Direct Debit schemes.




3-D Secure An authentication method that protects merchants in case of fraudulent use of a payment card on their website. It allows a strong customer authentication.


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