Our recommendations are as follows in terms of dunning management best practices. With B2C accounts, we generally recommend a shorter cycle with more emails, since it’s typically a customer, and they do not need any approvals to get the payment processed. With these types of accounts we’ve seen that the more emails that are triggered, the better.
For B2B, we recommend a longer cycle with less emails. Since it is typically finance/accounting teams, the less interaction the better because they have an internal approval process. Our recommendation is 2/3 notices a week.
Our blog here also outlines some best practices.