Security effort naturally gravitates toward screens - passwords, backups, suspicious emails - and it is easy to forget that a great deal of sensitive information still exists on paper, and that paper still has to be thrown away. Invoices, statements, delivery notes, printed emails, application forms, notes from meetings, old records and anything containing names, addresses, account details or signatures all pass through a business on paper, and when they are finished with, they go in a bin. An ordinary bin, or an open recycling box, is not disposal in any secure sense; it is a container of readable documents that leaves the building intact, and what is legible in the bin is legible to anyone who looks in it.
The risk is quieter than a dramatic breach but real, and it has two edges. One is straightforward: discarded paper containing personal or financial details is a gift to anyone minded to misuse it, whether that is an opportunist going through waste or someone using a discarded document to impersonate a customer or the business itself. The other edge is obligation - a business that holds other people's personal information generally carries a responsibility to protect it through its whole life, including the moment it is thrown away, and "we just put it in the recycling" is not a defence if that information later turns up where it should not. The document does not stop being sensitive because it has been finished with; it stops being controlled the moment it goes into an open bin.
The remedy is old and cheap: destroy confidential paper before it leaves the business rather than simply discarding it. For a small operation a cross-cut shredder - one that cuts into small pieces rather than long strips that can be reassembled - handles day-to-day sensitive waste for very little money, and building the habit of shredding anything with personal, financial or business-confidential detail on it, rather than binning it, closes the gap. For larger volumes there are confidential-waste collection services that provide locked bins and destroy the contents securely, which suits a business generating more paper than a desk shredder can keep up with. Either way, the principle is to have a designated route for confidential paper that ends in destruction, not in an open bin.
The reason this is worth a deliberate habit is that it is exactly the kind of precaution that feels unnecessary right up until it is not. Digital defences guard the front door while the back door - the waste that walks out readable every week - stays open, because paper disposal is nobody's obvious job and costs nothing to get wrong. Deciding what counts as confidential, giving it a route that ends in a shredder or a secure collection, and making that the normal way such paper is thrown away turns an invisible, recurring leak into a solved problem, for an outlay small enough that the only real obstacle is remembering the bin was ever a risk at all.