If you change the constituent in a Membership Dues Batch, you might notice that the credit card payment information from the first constituent is retained.
This is a scenario in which the credit card would have already been tokenized. With this in mind the decision to remove the credit card information from the batch row would need to be a manual change by the CRM end user.
Steps to Duplicate
1) Register for a membership using a credit card in BBIS and download the transaction into CRM. 2) Open the batch and take a look at the Membership details and payment information. 3) Change the constituent in the batch. 4) Notice that the membership details have cleared out but the credit card information from the original constituent remains.