Just recently read how postal services work,now it depends a lot on the country,but main point was that mail services specially monitor the letters that dont have recipients name on it,and specially if such mail has tracking on them-no need to be genius really why.
Only point i can add if one doesn't want to use name ,use someone else related,who might live near by,but would know you,family is the best.That said if you order some crazy $hit remember they might suffer for your actions.
best way for prescription stuff is quantity,under certain amounts if keep below 50-100pls custom have right to open item and inspect,but usually they look for illegal stuff and items like bzp aren't biggest priority and should go trough-unless it raises suspicion they might request proof from md for prescription.In my couple years of dealing with iops i had 2-3 letters that were seemingly checked small open marks but not completely open to see whats inside,so guess more like to do sniffing for dogs stuff :] .Also had one item delivered split open in the plastic bag years before with pure pfizer x@nnie box,although i had prescription,also there was receipt in the box, postman didn't even blink nor there was delay in delivery.
that said this applies to most EU countries,and every country is still different,so one should read more in their postal faq to get idea how mail operates in their place.peace