Is there any sort of guarantee that my claim will be accepted? Or, do you have some trade secrets that increase the likelihood of a claim being accepted?

Many years ago, I had to file a claim on a damaged package and it was denied. Photographic evidence of a moderately crushed box with several open holes was not convincing enough. That day, I swore that I would never buy shipping insurance again.

I would love to insure packages again if I knew that a legitimate claim would be accepted.