For those who believe that all cardboard boxes can be reused for shipping, pay close attention to the stamp which is placed on every shipping box.
We (the company I was working with at the time) used standard size shipping boxes which we bought in bulk from one of the manufacturers. Each box was meticulously packed as suggested by the shippers we used.
UPS got the call to pick up a custom made $4,500.00 rifle packed as instructed. It arrive at the client's home with a broken stock and bent barrel. An insurance claim was filed and we waited for the check. A replacement rifle was built but shipped using another carrier. It arrive just fine.
UPS denied the claim so we got real aggressive with the their insurance folks. They sent 3 upper level representatives to view the damaged box, packing and rifle. End result straight from their mouths was that the box was NOT certified correctly for the contents. No further action was allowed or take.
You HAVE to use a properly certified box with that seal intact and legible.
This is just an example:

Hard lesson to swallow because we knew nothing about this seal. No one, not UPS, FED-X or the USPS bothered to inform us when using their insurance.
End result, we pulled a huge account from them completely. They came back to try to work this out without settling the insurance and the result was the same, no more account with UPS.
FEDX came in with a team of packaging experts to spend two days assisting with the solution.
