We do not take on request for special packaging, as we have the strongest mailers available to us on the market, and we have a very small request for insurance on damaged packages. The policy of our shipping carrier is to handle all packages with care, and that's what we believe in what they do - which they also do. Ofcourse, sometimes packages are badly handled, and there's really no getting around such thing as it comes down to each single worker for the shipping carrier, and we can ofcourse not affect that in any way or shape. It happens, unfortunately - but we have insurance on all packages for those few instances of this happening.
But you can do a couple of things to prevent seam splits and bend corners, you can ask for your records to be shipped outside the jacket, and by doing that you increase the chance of small bends and seam splits not happening.