[mothered]

Police wouldn't issue a police report as they deemed it a civil matter not a criminal one.

As per my comment below, I could see It coming.

Although a PR has no relevance to the claim

Amazon refuse to proceed with the claim without police report even though I told them it was impossible for me to get it.

I can't fathom why Amazon fail to see that It's not a theft-related Incident, hence It doesn't warrant a PR.

Seriously, reps and the like In the claims department who cannot use common sense, should not be employed In that capacity. Ask the police officer to put It In writing that It's a civil matter, and then forward It to Amazon. If they're still adamant with their stupidity, request your claim be escalated.

Thinking I should just sealed box the return but wondering if that will now arouse suspicion and they will open the box when they receive it?

The thing Is, Amazon has It on record that you've claimed the Item was missing.

If they refer to their notes, It'll be Impossible to justify returning a box that was never opened.