Not 100% sure but it doesn't seem that letters are scrutinized like packages are. I've had a send or two in the priority boxes get tagged and then got a letter saying they thought there may be illegal contents/that I had 30 days to come and pick it up or the Postal guy would smoke it...'er...a.....it would be "destroyed"....
Sure thing. I'll be right down....
I've yet to have a letter tagged...or not make it to its destination. I learned the trick years ago when I was on OG. Heaven's Stairway sent all of their seeds in business envelopes.....from Canada (there was no tracking then)....and they sailed right in time after time. Just take precautions for the rollers...
The golden rule here is to never mail what you can't afford to lose.....and don't put your own address on the send. Use theirs as send/return...make sure there's enough stamps.....and BOOM. Smiles.
The reason reg mail isnt scrutinzed like packages are is bc it would be virtually impossible. The volume of regular mail in the system is hard to even put into words. On a regular day, your mail carrier delievers around 4 to 5000 pieces of mail every single day. This doesnt include packages.
Packages from source countrys (known drug distro countries like Netherlands and Germany) are always going to be more of a risk. Anything that goes through customs is going to be a risk tho no matter what country its going to.
Now for US Domestic Packages....Express is heavily scrutinized bc is in basically a chain of custody. Its kept out of the "normal" mail stream. and there isnt very many of them so there easier to profile.
Priority coming from CA/WA/OR/CO is sometimes looked at a little harder....anywhere marijuana is legalized.
Not having a return address can get the packaged "flagged".
Having it all taped up and looking like a shotty package can get it flagged
Smelling like anything (weed/perfume/whatever) can get it flagged
***Just a tip: If the sender in being investigated bc they have been found to be sending prohibited shit through the system and he sends you a package...that package can and often times gets flagged.
*Use Prepaid shipping...not going to list them here but many exist.
Make sure whatever your sending has the proper postage for the weight of the package
Use Blue Boxes whenever possible so your not going into the office
****Regular mail...just an envelope and a stamp WILL ALWAYS be safer then sending a package w/ a tracking#.
But Reg mail is also the most likely to be lost or stolen.