A walkthrough uses one customer, one invoice, and the way you chase it. We reply by email. We do not call out of the blue.
You describe the cycle
Who issues the invoice, who sends the reminder, and which accounting file has to agree at the end.
We reply in writing
If a walkthrough is useful, we propose a time. If it is not, we say so.
Sample data only
Do not send invoices, bank details, card numbers, or your customers’ personal data through this form.