We are not currently able to push transactional data to the credit bureaus (e.g. Experian, TransUnion, and Equifax). Thus, we cannot guarantee that any transactions will positively or negatively impact any credit score of end cardholders. Credit building is a feature we are investigating for a future release.
If your business model is reliant on improving the credit scores of cardholders, please contact the credit bureaus directly to find a way to partner with them.