> ## Documentation Index
> Fetch the complete documentation index at: https://docs.noxpay.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Cryptocurrencies

> How currencies and networks work in Noxpay, and why sending to the wrong network means permanent loss.

Noxpay supports a set of cryptocurrency assets for receiving, holding, and withdrawing funds. Because most tokens exist on multiple blockchains, understanding the relationship between a currency and its network is essential before transacting.

## Currency + network pairs

USDT on Tron and USDT on Ethereum are treated as entirely separate assets — they have separate balances, separate deposit addresses, and cannot be used interchangeably.

This reflects how blockchain custody actually works. Each token exists on a specific network, and funds on one network cannot be directly moved to another. Moving USDT from Tron to Ethereum requires a cross-chain operation, which is outside the scope of a standard withdrawal.

## Balances are locked to their network

A balance of USDT (Tron) cannot fund a withdrawal to a USDT (Solana) address, and vice versa. If your counterparty needs USDT on Solana, you must hold USDT on Solana — not USDT on Tron, even though both display as "USDT" in a standard wallet.

## Cross-network transfers and lost funds

Noxpay validates withdrawal destinations against the expected network and blocks most cross-network attempts automatically. However, there is a class of network pairs where address formats are **indistinguishable**:

* **Ethereum** and **Avalanche C-Chain** both use the same `0x...` address format. A USDT (Ethereum) withdrawal address is visually identical to a USDT (Avalanche) address.

If a withdrawal is sent to an address that exists on the wrong network, the transaction will be broadcast and confirmed — but the tokens will not be credited on the destination chain. **The funds are effectively lost and cannot be recovered.**

<Warning>
  Always confirm the network with your recipient before initiating a withdrawal. The fact that an address looks valid is not evidence that it belongs to the network you are withdrawing from.
</Warning>

## Supported currencies

<CardGroup cols={3}>
  <Card title="USDT" href="/noxpay-docs-v2/api-reference/currencies/usdt" icon="dollar-sign">
    Tether's USD-pegged stablecoin, available on Tron, Ethereum, Avalanche, Solana, and TON.
  </Card>

  <Card title="USDC" href="/noxpay-docs-v2/api-reference/currencies/usdc" icon="circle-dollar-to-slot">
    Circle's USD Coin, available on Ethereum, Solana, and Avalanche.
  </Card>

  <Card title="Bitcoin" href="/noxpay-docs-v2/api-reference/currencies/bitcoin" icon="bitcoin-sign">
    The original cryptocurrency, supported on Bitcoin Mainnet.
  </Card>
</CardGroup>