Last updated: October 23, 2026
Before sending a large amount of crypto, send a small test transaction to the same address on the same network, confirm it arrived, and only then send the rest — it costs one extra network fee and catches wrong addresses, wrong networks, missing memos and swap problems before they become expensive. For swaps, the test is a small full swap with the same exchange and pair. It's the cheapest insurance in crypto, especially before a big no-KYC swap like BTC → XMR.
- 1 extra fee as insurance
- ~$20–30 typical swap minimum for the test
- Same address, network and memo
- Irreversible mistakes avoided
What a test transaction catches
| Problem | Caught by a test? |
|---|---|
| Wrong or mistyped address | Yes — it doesn't arrive where expected |
| Wrong network (ERC-20 vs BEP-20) | Yes — see wrong network |
| Missing memo / destination tag | Yes — see memo tags |
| Lookalike or poisoned address | Often — see address poisoning |
| Exchange that doesn't pay out or asks for KYC | Partly — a small swap shows how it behaves |
| Quote vs order mismatch | Yes — compare the received amount (fake rates) |
How to do a test transaction (step by step)
- Copy the address from the source — the recipient's wallet or the order page, never your history.
- Send a small amount on the exact network you'll use for the full amount, with the memo if required.
- Confirm arrival in the destination wallet or by TXID — see tracking a transaction.
- Send the rest to the same verified address.
- For swaps: run a small swap first, check the amount received matches the quote, then create a new order for the main amount (deposit addresses can be single-use).
Large swaps: extra precautions
- Split into several swaps rather than one huge deposit; large single deposits attract more screening — see own vs partner liquidity.
- Prefer exchanges with high limits and a strong record — large amounts guide, best for large amounts.
- Use fixed rates to avoid slippage on big orders.
- Always set a refund address.
Frequently asked questions
Why should I send a test transaction?
It confirms the address, network and memo are right before you risk a large amount. Crypto transfers are irreversible, so one small fee is cheap insurance.
How much should a test transaction be?
Enough to arrive and be meaningful — for swaps, at least the exchange's minimum, often around $20–30.
Can I reuse a swap deposit address after the test?
Not always. Many exchanges create a new deposit address per order, so create a new order for the main amount.
Is a test needed for every transfer?
For small, routine transfers to known addresses, no. For first-time addresses, new networks or large amounts, yes.
Does a test transaction cost extra?
Only one additional network fee — usually tiny compared to the amount it protects.
Test small, then swap: BTC → XMR, USDT → BTC or all pairs. No account, no ID, no logs.