Diagnosis
When you enter a credit card number, take into account the following:

• The credit card number has a maximum length of 21 characters

. It comprises the credit card company code and the actual creditcard number.

• The first two characters identify the credit card company

.
The following abbreviations of credit card companies are defined in thesystem:
AX American Express Company
DI Diners Club International
EC Euro Card
TP UATP card company (e.g. Lufthansa Air Plus)
VI Visa International
JC,,JCB Japan
If you use SAP R/3 Enterprise Travel Extension 1.10 (EA-HR 110), youcan create additional credit card companies in the Travel ManagementCustomizing using the Define Credit Card Company
IMG activity.

• The other 19 characters are the actual credit card number

.
Warning:
It is currently not possible to check the credit card number morethoroughly, for example using a check digit.
Therefore, ensure you check your entries carefully.

Procedure
Check the credit card number you entered as described above.
Check if the credit card abbreviation exists in the R/3 system. To doso in the SAP R/3 Enterprise Travel Extension 1.10 (EA-HR 110), callthe Travel Management Customizing and then theDefine Credit Card Company IMG activity. Ifthe abbreviation does not appear in the list specified above or in theIMG activity, you can immediately create it in the IMG activity.