u/Halohere32

I need to send letters to my friends in abroad but im confused about it and my post office officers arent answering me properly

1. type of envelope i need to use ! The ✉️ one or 🧧(brown) one ?

2. can i send without tracking link ? The cheaper one cus i would send frequently and registered one is expensive

3. apart the stamps fee , do i need to pay the tracking link enabled registration compulsory?

4. can i book through app and ease the process ? And how ? Cus the officers are just lazy to even speak a word here