How are the mailing addresses stored?
The addresses are stored until the mailing is done, then they are deleted forever and ever. You can put your initials, unless your country requires your full name. Not putting a name may increase your chances of delivery failure. I don't store the addresses long term like a "list." The addresses are deleted when mailing is done. Lastly, I can assure you that I don't care about you, your name, your Ark address, or your mailing address, and I CERTAINLY will not be providing the information to anyone else. I just want to send you stickers, because you want the aforementioned stickers.
Also, you can move Ark from the exchange to a brand new address, then send the Arks from that new address to ArkStickers.com.