Look for shoes lined up outside the door before you knock — if you see a pile, yours goes there too, no need to ask. Many households leave a pair of slippers by the entrance for guests to switch into.
The same applies at temples and pagodas, and in some kindergartens and small shops, so it’s worth treating any doorway with a shoe pile the same way rather than assuming it’s a home-only rule.
- Greet the eldest person in the room the moment you’re inside — shoes off at the door and elders greeted first happen in the same few seconds of walking into a Vietnamese home.