I think i have posted this up before but when posting letters NEVER USE STAMPS, make sure you lodge it at the postoffice and they have there printed sticker on it, if it costs $0.70 tell them to charge it as a large letter $1.40 and once that sticker is on TAKE A PHOTO. Was told this last year from paypal as this is proof of lodgement with the reciept. After losing a few items and having a few cases opened paypal have favoured me everytime with this method, hope this helps  🙂