What's the most expensive document you almost lost?

Mine was a Volvo warranty repair, $1,400 of work, fully covered. I found out about the coverage three days before it expired, completely by accident, buried in a PDF I'd half-remembered uploading somewhere.

That's actually what pushed me to start building Dossiq. Not a grand vision. Just genuine frustration that a folder full of important documents was essentially useless because nothing in it was findable or actionable.

The EOB with a dispute deadline you didn't know existed. The home warranty that would've covered the HVAC. The insurance card you needed in an urgent care waiting room at 11pm.

What's yours - the document that cost you (or almost cost you) because you couldn't find it fast enough?

Launching April 14th. Curious what real people's experiences look like before we go live.