Insurance on USPS Lost Shipment?

So i sent out a package worth 400$ to a relative. But the shipment

never got their. Also it was on first priority mail, i have insurance on the package. I wanted to know if you have to take the paper slip to the Postal office to file the claim. And approximately how long will it take to get the money from the insurance?Insurance on USPS Lost Shipment?
Yes, you have to take the insurance receipt to the post office to file the claim, along with proof of value - the receipt for what you bought.Insurance on USPS Lost Shipment?
Call 800-ASK-USPS. THey can answer your questions better than anyone here can.