Yu-Packet Post Mini (Envelope) - 100 Sheets - Includes Manual for Flea Market Sellers

(Heavyweight Harassment Response Manual)
This is a manual for dealing with harassment, specifically threats, stalking, and slander, based on over 100 cases handled on flea market apps like Mercari. It will help you respond with mental composure. Includes actual message exchanges from Mercari. If you only want the manual, please search for it on my profile as I have it listed separately.

(Table of Contents)
1. Introduction
2. Heavyweight Harassment Response Manual Details for Flea Market App Sellers
3. Appendix: Actual Trouble Response Cases
* ① Actual Message Exchanges with Heavyweight Harassment Recipients
* ② Actual Consultation/Reporting Content to Mercari Support
4. Author Profile

(Yu-Packet Post mini)
For those who find it inconvenient to go to the post office to buy, or for those in a hurry! Same-day shipping is available at the earliest.

*Note: These are sold for 20 yen each at the post office. Recommended for those who don't mind paying a little extra for shipping and Mercari fees. The price includes 180 yen for shipping and 70 yen for Mercari fees. We believe this is a good value considering the time and effort you would spend going to buy them yourself.

--- Useful Tips ---
I've learned a few things from shipping with Yu-Packet Post envelopes and stickers for over a year. Please use these as a reference!

(Notes on Packing)
The four sides appear to be glued. If you stuff them too tightly, they may tear. Reinforcement with clear tape is necessary.

(Shipping Notes)
I've learned the following from shipping daily with Yu-Packet Post stickers or mini envelopes:

1. It takes longer than hand-to-hand courier services. For example, between Tokyo and Osaka, even if you put it in the mailbox first thing in the morning, it often takes two days to arrive.
2. If the destination is unknown due to input errors, the post office will not call to confirm. The item will be left unattended.
3. Keep the receipt until the transaction is complete. If you call, they will return it even if you've already shipped it without scanning the QR code. It becomes difficult to track if you ship more than 2 items per day.

Even if you don't purchase this item, please consider following me. I try to include useful information beyond the product description.

Update on Usage: January 20, 2026

Yu-Packet Post mini, mini, dedicated envelope