Multisig on TRON for business: how to protect a USDT treasury

How TRON account permissions work

Every TRON address has permissions:

• owner — full control, including changing the permissions themselves;
• active — allowed actions, such as transfers, without the right to change the owner.

Each permission gets a list of keys with weights and a threshold. A transaction passes only when the weights of the signing keys reach the threshold. That is multisig: for example, three keys with weight 1 and a threshold of 2.

Why a treasury needs several keys

• Losing one key does not lock the money: the other two are enough.
• Stealing one key does not let a thief move the funds.
• One employee cannot withdraw money without a second one: protection and internal control at once.

How to set it up safely

1. Create the keys on different devices, ideally hardware wallets, held by different people.
2. Set the threshold for owner and active permissions, for example 2 of 3. Changing permissions costs a fee charged in TRX.
3. First send a small amount and check that a transfer passes with two signatures and fails with one.
4. Write down who holds which key and what to do when an employee leaves.

Store the keys’ seed phrases as strictly as any other, see how to store a seed phrase.

Check whose keys control the address

Scammers use the same permissions: they hand over a “wallet with money” or a seed phrase where the owner is their key, and you cannot withdraw a cent, see the seed phrase and multisig trap.

So after setup and before accepting large sums, check the address in GuardPay /check: it shows whether there is multisig and whether outside keys are in the permissions.