The useful answer is not simply yes or no
Keeping a passport or ID copy on your phone can be extremely practical.
It can also create a surprisingly large trail of duplicates if the same image gets photographed, emailed, messaged, downloaded and screenshot again.
The important question is less Can a copy be on my phone? and more How many copies exist, where are they, and who can reach them?
First ask what you actually need
Sometimes the real need is a passport number and expiry date for check-in.
Sometimes a school, insurer, employer or booking flow asks for an image of the document.
Sometimes the physical original is required.
Those are three different situations. Do not keep the most sensitive version everywhere just because one workflow once needed it.
Protect the device before organizing the files
If the phone itself is easy to open, the folder structure is not the main problem.
Use the protection available on the device, then reduce the number of places where sensitive images sit outside your deliberate document system.
Watch the copies that escape the system
The organized copy is easy to remember.
The attachment from six months ago is not.
Search old message threads, downloads, screenshots and email attachments after a document-heavy task and remove duplicates you no longer need.
That habit often matters more than finding a more complicated folder hierarchy.
Digital copy and physical original have different jobs
A phone copy is a convenience and reference layer.
It does not turn the physical passport, ID or other official original into something you can leave behind whenever the real document is required.
Panza follows the same principle inside the app: the card is the shortcut, while the source document remains available behind it.
Share the smallest useful thing
When another person needs access, avoid broad sharing by default.
A specific document shared with a specific person is easier to reason about than an entire folder of family IDs, insurance papers and travel documents.
That is why Panza’s sharing model is document-specific rather than archive-wide.