This manual describes configuring and using the Computop interface for Barzahlen:
Barzahlen is aimed at customers in Germany who do not want to enter sensitive data online, and those who do not use credit cards or online banking. An alternative to cash on delivery, Barzahlen is quicker and less expensive. Customers pay the amount to an associated retailer, on the basis of a payment form; the retailer transmits a payment confirmation in real time to the online shop so that the goods can be dispatched quickly.
Barzahlen is a payment provider for cash transactions. Customers use cash to pay for online purchases, travel bookings or diverse invoices. It is also possible to pay by cash to one’s own giro account.
The customer receives a barcode via email, SMS or Post to process the payment. This barcode is then scanned at the checkout of an individual partner branch and the customer pays with cash or another permitted payment method. The supplier is notified about payment in real time by the checkout system once the customer has paid. The payment service is carried out by Greensill Bank AG from Bremen.
Currently cash payments are made throughout Germany in over 10,000 branches of the REWE markets, dm-drogerie markets, PENNY markets, real,- supermarkets, Telekom Shops, mobilcom-debitel branches and with Budni chemists and in branches of the Dr. Eckert group.
Cash payments offer users who prefer cash, the option to buy, gamble or to book travel online without entering sensitive financial data. This cash option, means it is the only payment system available to every German without restriction. 68% of Germans over 18 years have no credit card (Deutsche Bundesbank 2015) and 51% do not use online banking (Bundesverband deutscher Banken 2014).
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With Barzahlen online purchases in Germany at over 10,000 branches of retail partners such as real,- can be paid for in cash. The additional customer potential encompasses amongst other things those Internet users who do not yet purchase online.
You must send the division-ID together with the payment key to the Computop Support at Computop Helpdesk, in order to activate this payment method within your MID on Paygate.
Paygate interface
Definitions
Data formats
Format
Description
a
alphabetical
as
alphabetical with special characters
n
numeric
an
alphanumeric
ans
alphanumeric with special characters
ns
numeric with special characters
bool
boolean expression (true or false)
3
fixed length with 3 digits/characters
..3
variable length with maximum 3 digits/characters
enum
enumeration of allowed values
dttm
ISODateTime (YYYY-MM-DDThh:mm:ss)
Abbreviations
Abbreviation
Description
Comment
CND
condition
M
mandatory
If a parameter is mandatory, then it must be present
O
optional
If a parameter is optional, then it can be present, but it is not required
C
conditional
If a parameter is conditional, then there is a conditional rule which specifies whether it is mandatory or optional
Notice: Please note that the names of parameters can be returned in upper or lower case.
Call of interface for Barzahlen
To carry out a Barzahlen payment via a Server-to-Server connection, call the following URL:
Notice: For security reasons, Computop Paygate rejects all payment requests with formatting errors. Therefore, please use the correct data type for each parameter.
Amount in the smallest currency unit (e.g. EUR Cent). Please contact the Computop Helpdesk, if you want to capture amounts <100 (smallest currency unit).
Complete URL which Paygatecalls up in order to notify the shop about the payment result. The URL may be called up only via port 443. It may not contain parameters: Use the UserData parameter instead.
Common notes:
Before follow-up actions (capture / credit / reversal) are carried out on an existing transaction, the first Notify must have been answered by the shop.
Fraudster may just copy the encrypted DATA-element which are sent to URLFailure and send the DATA to URLSuccess/URLNotify. Therefore ensure to check the "code"-value which indicates success/failure of the action. Only a result of "code=00000000" should be considered successful.
If specified at request, Paygate forwards the parameter with the payment result to the shop.
Key
Format
CND
Description
Beschreibung
OrderDesc
ans..512
M
Description of purchased goods, unit prices etc. The first 50 characters appear in the merchant’s settlement file. You can view the full data in the list within Computop Analytics.
Beschreibung der gekauften Waren, Einzelpreise etc. Die ersten 50 Zeichen erscheinen erscheinen auf dem Settlement File des Händlers. In der Liste inComputop Analytics können Sie die kompletten Daten einsehen.
To avoid double payments or actions (e.g. by ETM), enter an alphanumeric value which identifies your transaction and may be assigned only once. If the transaction or action is submitted again with the same ReqID, Computop Paygate will not carry out the payment or new action, but will just return the status of the original transaction or action.
Please note that the Computop Paygate must have a finalized transaction status for the first initial action (authentication/authorisation). This does not apply to 3-D Secure authentications that are terminated by a timeout. The 3-D Secure Timeout status does not count as a completed status in which the ReqID functionality on Paygate does not take effect. Submissions with identical ReqID for an open status will be processed regularly.
Notice: Please note that a ReqID is only valid for 12 month, then it gets deleted at the Paygate.
Key
Format
CND
Description
Beschreibung
CustomerID
ans..80
C
Customer ID or customer number.
If this value is not transmitted, the email address must be transmitted.
Kunden-ID oder Kundennummer.
Wird kein Wert übergeben, muss die E-Mail-Adresse übergeben werden.
Email
ans..80
C
Email address of the customer.
If this value is not transmitted, the CustomerID must be transmitted.
E-Mail-Adresse des Kunden.
Wird kein Wert übergeben, muss die CustomerID übergeben werden.
Street
ans..60
O
Customer's street and street number to find the nearest points of acceptance
Straße und Hausnummer des Kunden zur Ermittlung der nächstgelegenen Annahmestellen
ZIP
ans..10
O
Customer's post code to find the nearest points of acceptance
Postleitzahl des Kunden zur Ermittlung der nächstgelegenen Annahmestellen
City
ans..50
O
Customer's city/town to find the nearest points of acceptance
Wohnort des Kunden zur Ermittlung der nächstgelegenen Annahmestellen
CountryCode
a2
O
Country code according to ISO 3166. The default is DE.
Ländercode zweistellig gemäß ISO 3166. Standard ist DE.
Language
a5
O
5-digit language code which impacts the language of the payment form and the response parameters. The default is de-DE.
5-stelliger Sprachcode, beeinflusst die Sprache des Zahl-scheins und der Antwort-Parameter, Standard ist de-DE.
Expiration
n..4
O
Validity of payment form in days. The default validity period of the payment form can also be provided within the Barzahlen backend.
Gültigkeit des Zahlscheins in Tagen. Die Standard-Gültigkeit eines Zahlscheins kann auch im Barzahlen-BackEnd hinterlegt werden.
"Custom"-parameter is added to the request data before encryption and is part of encrypted "Data" in Computop Paygate request. By this they are protected against manipulation by a consumer.
The Custom-value is added to the Computop Paygate response in plain text and the "|" is replaced by a "&". By this you can put a single value into Custom-parameter and get multiple key-value-pairs back in response for your own purpose.
Parameters for payments with Barzahlen
The following table describes the result parameters with which the Computop Paygate responds to your system
pls. be prepared to receive additional parameters at any time and do not check the order of parameters
the key (e.g. mid, RefNr) should not be checked case-sentive
"Custom"-parameter is added to the request data before encryption and is part of encrypted "Data" in Computop Paygate request. By this they are protected against manipulation by a consumer.
The Custom-value is added to the Computop Paygate response in plain text and the "|" is replaced by a "&". By this you can put a single value into Custom-parameter and get multiple key-value-pairs back in response for your own purpose.
Response parameters for payments with Barzahlen
The following table gives the results parameters which the Paygate transfers to your URLNotify:
"Custom"-parameter is added to the request data before encryption and is part of encrypted "Data" in Computop Paygate request. By this they are protected against manipulation by a consumer.
The Custom-value is added to the Computop Paygate response in plain text and the "|" is replaced by a "&". By this you can put a single value into Custom-parameter and get multiple key-value-pairs back in response for your own purpose.
Response parameters for URLNotify with Barzahlen
The merchant has to implement the following code on his page in order to display the Barzahlen checkout page.
Notice: For security reasons, Computop Paygate rejects all payment requests with formatting errors. Therefore, please use the correct data type for each parameter.
Notice: For security reasons, Computop Paygate rejects all payment requests with formatting errors. Therefore, please use the correct data type for each parameter.
Amount in the smallest currency unit (e.g. EUR Cent). Please contact the Computop Helpdesk, if you want to capture amounts <100 (smallest currency unit).
To avoid double payments or actions (e.g. by ETM), enter an alphanumeric value which identifies your transaction and may be assigned only once. If the transaction or action is submitted again with the same ReqID, Computop Paygate will not carry out the payment or new action, but will just return the status of the original transaction or action.
Please note that the Computop Paygate must have a finalized transaction status for the first initial action (authentication/authorisation). This does not apply to 3-D Secure authentications that are terminated by a timeout. The 3-D Secure Timeout status does not count as a completed status in which the ReqID functionality on Paygate does not take effect. Submissions with identical ReqID for an open status will be processed regularly.
Notice: Please note that a ReqID is only valid for 12 month, then it gets deleted at the Paygate.
Parameters for credits of Barzahlen payments
The following table describes the result parameters with which the Computop Paygate responds to your system
pls. be prepared to receive additional parameters at any time and do not check the order of parameters
the key (e.g. mid, RefNr) should not be checked case-sentive
Notice: Reverse.aspx does not only reverse authorisations, but any LAST TRANSACTION STAGE! If the last transaction was a capture, Reverse.aspx initiates the reverse, e.g. a credit. Therefore, the utmost caution is urged. Use is at your own risk. We recommend checking the transaction status with Inquire.aspx before using Reverse.aspx.
Notice: For security reasons, Computop Paygate rejects all payment requests with formatting errors. Therefore, please use the correct data type for each parameter.
Amount in the smallest currency unit (e.g. EUR Cent). Please contact the Computop Helpdesk, if you want to capture amounts <100 (smallest currency unit).
To avoid double payments or actions (e.g. by ETM), enter an alphanumeric value which identifies your transaction and may be assigned only once. If the transaction or action is submitted again with the same ReqID, Computop Paygate will not carry out the payment or new action, but will just return the status of the original transaction or action.
Please note that the Computop Paygate must have a finalized transaction status for the first initial action (authentication/authorisation). This does not apply to 3-D Secure authentications that are terminated by a timeout. The 3-D Secure Timeout status does not count as a completed status in which the ReqID functionality on Paygate does not take effect. Submissions with identical ReqID for an open status will be processed regularly.
Notice: Please note that a ReqID is only valid for 12 month, then it gets deleted at the Paygate.
Parameters for reversals of Barzahlen payments
The following table describes the result parameters with which the Computop Paygate responds to your system
pls. be prepared to receive additional parameters at any time and do not check the order of parameters
the key (e.g. mid, RefNr) should not be checked case-sentive
Error code according to Paygate Response Codes (A4 Error codes)
Result parameters for reversals of Barzahlen payments
Batch processing via the interface
Basic information about using Batch files and about their structure can be found in the Batch Manager manual. Within batch processing not alle functions are available which are usually available for the online interface.
This section describes the parameters which must be transferred within the data set (Record) for executing reversals or credits with Barzahlen and which information can be found within the response file about the payment status.
For Batch calls there must be considered batch versions, from which optional parameters depend. All version designations starting with „2.“ pertain calls for a group of enterprises. That means within a batch file for a particular MerchantID can be transferred transactions for other merchants with a separate Sub-MID.
Following table gives an overview of all batch versions that are possible for a specific action and their specialities:
Amount in the smallest currency unit (e.g. EUR Cent). Please contact the Computop Helpdesk, if you want to capture amounts <100 (smallest currency unit).
The following table describes the response parameters which the Batch Manager saves in the Record area for each transaction (standard parameters not explained here, such as <TransID> or <RefNR> and request parameters are returned unchanged and correspond to the call as specified before):
pls. be prepared to receive additional parameters at any time and do not check the order of parameters