(also posted in #C29HKGM6J) Wondering if there is some sort of "best practice" for accepting ACH payments against Customer Invoices? Client of mine has a lot of items that are the same price, which means they have a lot of invoices that are the same price. They have customers that buy frequently and will send a (let's say for examples sake) $1000 ACH payment. But the customer may have 6 open invoices that could all be $1000. My client has said they just get a part of the companies name on the ACH information. Should they tell Customers upfront that the Customer needs to provide a list of Invoices they want to pay, and maybe when the payment will be scheduled for? Or is there a better way to handle this?

Usually I tell customers “if you do not define the invoices to be paid we will always apply them to the oldest invoices”