Well, because of its size, it was actually in a garbage bag
OFAH was the ones who told me it would weigh the same frozen, and doggonit, they were right. I weighed it that night before it was frozen, then we left it outside (it was January remember and it would not fit in the freezer), then I took it to the post office frozen and it weighed exactly the same.
The post office tried to give me a hard time. They thought they had to sign verifying that they had witnessed me catch the fish. I politely had to point out all they had to witness was the weighing of the fish. I had to ask for the manager tho.
Good luck.
If you have any more questions, just ask.
Joey