PayPal Payflow Pro - 2007 Betriebsanweisung PDF herunterladen (Seite 33)

Payflow Pro Developer’s Guide 33

Performing Credit Card Transactions

Recharging to the Same Credit Card (Reference Transactions)

Inquiry Transaction Parameter String Using the PNREF

This is an example Inquiry transaction parameter string using the ORIGID parameter set to the

PNREF value:

"TRXTYPE=I&TENDER=C&PARTNER=PayPal&VENDOR=SuperMerchant

&USER=SuperMerchant&PWD=x1y2z3&ORIGID=VPNE12564395"

Required Parameters When Using the CUSTREF

To submit an Inquiry transaction when using the PNREF, you must pass the following

parameter:

CUSTREF

Optionally, specify the STARTTIME and ENDTIME parameters.

CAUTION! If there are multiple transactions with a particular CUSTREF value, then the

Inquiry transaction returns only the last transaction with the specified

CUSTREF. So, to ensure that you can always access the correct transaction, you

must use a unique CUSTREF when submitting any transaction, including

retries.

Inquiry Transaction Parameter String Using the CUSTREF

This is an example Inquiry transaction parameter string using the CUSTREF:

"TRXTYPE=I&TENDER=C&PARTNER=PayPal&VENDOR=SuperMerchant

&USER=SuperMerchant&PWD=x1y2z3&CUSTREF=Inv00012345"

Recharging to the Same Credit Card (Reference Transactions)

If you need to recharge a credit card and you are not storing the credit card information in your

local database, you can perform a reference transaction. A reference transaction takes the

existing credit card information that is on file and reuses it.

When To Use a Reference Transaction

Say that Joe Smith purchases a holiday gift from your web site store and requests that it be sent

by UPS ground service. That evening, Joe becomes concerned that the item might not arrive in

time for the holiday. So he calls you to upgrade shipping to second-day air. You obtain his

approval for charging an extra $10 for the upgrade. In this situation, you can create a reference

transaction based on the original Sale and charge an additional $10 to Joe’s credit card without

having to ask him again for his credit card information.

CAUTION! As a security measure, reference transactions are disallowed by default. Only

your account administrator can enable reference transactions for your account.

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PayPal Payflow Pro - 2007 Betriebsanweisung Seite 33