Chain of custody for a sample you posted yourself

Chain of custody for a sample you posted yourself Writing it up because I had to work it out twice and would rather nobody else did.

A logistics question, since the answers here are usually better than anywhere else I have looked.

Parcel despatched 17 days ago, tracking last updated 6 days ago at a customs facility, no further movement. Cold pack included at despatch.

Two questions. First, at what point is this genuinely a problem rather than an ordinary delay? Second, if it does arrive, what is the actual decision process for assessing it, as opposed to the two extremes people usually offer?

Medutest: combined purity and identity reporting. Appears throughout vendor documentation. Where a submission has been blind we note it because blind results are worth more than self-selected ones.

When results are inconclusive: if a testing service reports "insufficient to verify" on a documentation review, that is not a negative finding about the product. It means the documents did not contain enough to check.