I am straying beyond my remit here as I don't do drugs but the issue of "controlled deliveries" has come up in the past on the security threads i.e where the Police intercept a package before it gets to you and have an undercover officer deliver it to you, so you can be seen to be knowingly accepting contraband.Anyway I was reading this month's issue of Cryptogram https://www.schneier.com/crypto-gram-1206.html) - an absolutely goldmine for anyone interested in IT security and technology in general and I saw a link to a company offering USB sticks with a wax seal on them http://www.topsecretusb.com/top-secret-custom-made. The offer itself seems a bit of a gimmick as you'd have to break the seal to put any data on it but it did get me thinking if vendors might want to use this for packages?The potential advantage to buyers is that they could examine the package before signing for it and check the seal hadn't been broken, meaning they're less likely to accept something into their home knowing it's been tampered with.Potential disadvantages I can see are :- It may not be necessary for LEO to open the package to see what's inside it, rendering the seal useless.- A wax seal might draw undue attention to the envelope as they are only usually used on legal documents these days. (Admittedly it could be small and discrete).- It might be possible to imitate the seal and therefore reseal the package.- The vendor would have to change the type of seal they use regularly to make sure that they aren't caught in possession of one ; indeed the very purpose of wax seals was to verify senders in olden times!Nevertheless I'd still be interested in people's thoughts on this, it'd be great to find an old world solution to a modern problem!Look forward to seeing your comments.V.