I have suggested it before, and I still find it very problematic, that Simplero doesn't give me any notification when an installment from one of my customers fails. I can't even see it in the emails sent-log for the customer, that my automated emails for failed installments have been sent.
Since my relationship with my customers/clients is pretty personal, me being af therapist, it is very bad that I don't know of problems with payments, when I meet them! Also I would of cause like to be able to see ALL emails, that have been sent, in the log, including automated ones related to failed payments.