It's an add on product.
There are a few program managers/processors who offer this right now (google prepaid overdraft protection). Follows all the same rules as a traditional bank bounce protection product. Customers have to elect to have it.
And I thought I had read that this product was not allowed to be offered if the issuing bank was greater than $10 billion, but I can't find that article now.
Just trying to figure out if I'm imagining this