Two shielded features most people never use: a private note on a payment, and a way to show your history to one person without risking your coins.
Shielded paymentCarries a private note: “May rent”. Only the receiver can read it.Transparent paymentNo memo. There is nowhere to put one.The note can be up to 512 bytes: about 512 English letters, fewer with emoji or many non-Latin scripts, which take 2 to 4 bytes each. Ledger Wallet desktop allows 250 characters.
A viewing key lets someone see your shielded payments without being able to spend. There are two kinds.
sees it hidden
Wallet Viewing Keyand share it. Zingo can also restore a watch-only wallet from someone else's key.
A shared key can't be taken back. Whoever has it keeps seeing new payments to that wallet for good. Share the smallest key that does the job, usually the incoming one for tax work. And a viewing key is not your recovery phrase: never share that.
Need records for taxes instead? Zodl exports a file of last year's transactions: Advanced Settings, then Export Tax File.