To add credit card images so that they display during checkout of a Authorize.net transaction you will need to be familiar with HTML and PHP coding. Please follow the instructions below:
1. (Using an FTP client such as Filezilla), create a new folder called
cc in the ../catalog/images/ folder on the remote server
2. Upload the images to the cc folder that you just created on the remote server
3. Download the file authorizenet.php located in ../catalog/includes/<language>/modules/payment/
Note: The <language> should be replaced with the actual language you are altering. Also, if you support multiple languages then you may be required to change each of the files within the corresponding language directory.
4. Using a text editor (eg. Notepad), edit the MODULE_PAYMENT_AUTHORIZENET_TEXT_TITLE variable by adding the following to the the existing text (where imagename is the name of the image file you uploaded to the cc folder in step #2 above and card_type_name is the type of credit card):
Use: <img src="images/cc/imagename" width="20" height="20" border="0" alt="card_type_name">
3. Save the changes to the authorizenet.php file and then upload it back to ../catalog/includes/
/modules/payment/
This document is FAQ428.