Unless you spent thousands of dollars on a commercial grade network copier/scanner/printer, you don't have to worry about your past copy/scan jobs as there won't be a hard drive that would store whatever data was sent to it. Corporate printer/copier/scanners use internal hard drives to store item that are copied or scanned for a variety of reasons that improve performance and reliability, especially for very large document scans or copies.

Many stories have surfaced over the years of the ability to recover information from printer hard drives. One local data repair center was asked to gather information from a corporate copier/scanner that was headed for recycling. Within 15 minutes they recovered payroll records from a large restaurant chain. With this in mind, everyone should be careful what personal records you might scan or copy at your work place. You don't have any ideas if the internal hard drive will be properly cleaned before it gets returned, sold or recycled.

Business owners should consider having the hard drive scrubber or removed from their commercial copier/scanners to protect everyone that has ever used it.

On home printers, this issue doesn't exist because the queuing is done via 'volatile' storage, which is memory that is flushed whenever we turn off our printers. It is possible, however, that you did store sensitive information when you first setup your device, especially if it has the ability to fax. Most consumer all-in-one printers store the user information and previously scanned/copied documents in the printer software on the computer instead of the printer itself.

You can generally figure out what information might be stored in your printer by going to the printer's setup menu. You might need to consult your owner's manual or the printer company's support website for specific instructions. If your printer is capable of storing any information, it will generally have a reset process to put the printer back to factory settings.