Papertunnel — Modern Delivery for Old-School Paperwork
Papertunnel is document delivery for the “I need to send this properly” moments.
Send completed PDFs online by fax or mail, keep proof/status, and avoid the usual mess: fax machines, printers, envelopes, post office trips, and monthly fax subscriptions.
It’s built for one-off important documents — IRS forms, notices, business paperwork, signed PDFs, and other submissions where you need a clear record after sending.
Upload. Send. Track. Keep proof.
You and the other commenter already landed on the real insight, that the proof is the product, not the fax or the mail. I want to push that one step further, because for the exact documents you name, IRS forms and legal notices, proof has a specific legal meaning, and that is where this either becomes very valuable or quietly risky.
For IRS deadlines, the rule that makes a mailing count as filed on time only credits specific methods, certified or registered mail and a short list of IRS designated carriers.
A generic delivery receipt or a fax confirmation is not automatically inside that safe harbor, so someone who relies on your tracking to prove they filed on time could be surprised if it is ever challenged.
Legal notices are similar, proof of service has formal requirements that a delivery confirmation does not by itself satisfy.
So the sharpest version of your product is to be precise about what the record proves.
What you give is solid proof of transmission, that a document was sent and delivered on a date. What it is not, unless you build for it, is proof of timely filing or proof of legal service.
If you say that plainly, and ideally offer the certified or registered option for the cases that need it, the proof becomes something people can actually rely on instead of something that looks like more than it is. That precision is the moat for this kind of tool.
The proof/status part feels more interesting than the delivery method itself.
A lot of people only think about document delivery when something important is at stake, so the record of what happened may end up being the product people value most.
Totally agree. People don’t really want fax or mail, they want proof that an important document was sent properly.
The delivery method is just the channel. The real value is the status trail, receipt, and record they can rely on later.
Interesting way of putting it.
I had a similar reaction when I read the thread, although I wouldn't try to unpack it properly in the comments.
Happy to continue by email if useful.