Watch-Only Addresses: Track Any Crypto Wallet Without Its Private Keys

By Daniel Carter

A watch-only address is one of the most underrated wallet features. You add a public address, and the wallet shows its balance and activity without ever holding the private key. Here's how it works in Taccoin and a few practical ways I use the idea.

What "watch-only" means technically

Blockchains are public. Anyone can read the balance of any address; only the private key can move funds. A watch-only entry stores just the public address, so the wallet can query balances and history but has nothing that could sign a transaction. If your phone is compromised, a watch-only entry gives an attacker nothing to spend.

Supported address types

• TRON addresses (starting with T), for example to watch USDT-TRC20.
• Bitcoin addresses (bc1...).
• EVM addresses (0x...), which covers Ethereum, BSC, Polygon, Arbitrum, Optimism, Base and Avalanche.

You can give each one an optional name, such as "Cold storage" or "Shop wallet".

Practical uses

• Monitor cold storage from your phone without importing its keys anywhere.
• Track a business wallet that a partner or employee operates.
• Keep an eye on a family member's wallet (with their consent) to help them spot unexpected activity.
• Check a payment destination before and after sending, for example a supplier's address.

Adding one

1. Open the wallet list and choose to add a watch address.
2. Pick the network type (TRON, Bitcoin or EVM).
3. Paste the public address and optionally name it.
4. Save. You can now check its balance and history; if you try to send from it, the app tells you it's watch-only.

Things to keep in mind

• You can't send from a watch-only address. That's the point.
• Never paste a recovery phrase or private key into a "watch" field anywhere. Watching only ever needs the public address.
• Remember that addresses are public: watching someone's address doesn't require their permission technically, so respect privacy.

Learn more: wallet.taccoin.com

Disclosure: This article is sponsored by Taccoin and describes a feature that exists in the app today. Educational content, not financial advice.