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Common Mistakes in the First Week with a Crypto Wallet

Most costly wallet errors happen in the first days, when deposits and addresses are still unfamiliar. This article lists the four that matter most and shows a simple habit that prevents each one.

Published September 30, 2026 · 3 min read

Common Mistakes in the First Week with a Crypto Wallet
Key takeaways
  • Match the network on both the sending and receiving side before every deposit.
  • Check the network minimum first, because deposits below it are not credited.
  • Scan the QR code instead of typing the address, since transfers cannot be reversed.
  • Send a small test transfer, at or above the minimum, before moving a large amount.

What is the most expensive mistake in the first week?

The most common costly mistake is sending a coin through a network the address was not issued for. The same coin can travel over several networks, but a deposit address belongs to only one of them. In Nexus Pay, for example, USDT and USDC can be deposited via TRC-20, ERC-20, BEP-20 and TON, and each address is issued for one of those networks. A transfer sent through a different network will not arrive and cannot be reversed. Choose the network first, copy the address issued for it, and make sure the sending side uses the same network.

Why was my deposit not credited?

One frequent reason is that the amount was below the network minimum. Every network has a minimum deposit amount shown in the app, and deposits below it are not credited. Check that figure before you send, not after. If the amount is fine, remember that deposits are credited automatically once the network confirms them, which takes from a few minutes to about an hour depending on the blockchain.

Should I type a wallet address or scan a QR code?

Scan the QR code whenever you can. Typing an address by hand risks a single wrong character, and because blockchain transfers are irreversible, nobody can bring back a transfer sent to the wrong address. If you have to copy and paste instead, compare the address on both screens before confirming. Treat the address check as part of the transfer, not as an extra step.

Is a small test transfer really worth it?

Yes, because it is a cheap safety check that a large transfer cannot offer. A small payment shows that the network, the address and the crediting all work as expected before real money is at stake. The test amount must still reach the network minimum, otherwise it will not be credited and proves nothing. Once it appears in the balance, send the rest.

The four first-week mistakes at a glance
MistakeWhat happensHow to avoid it
Wrong networkThe transfer does not arrive and cannot be reversedMatch the network on both sides
Amount below the minimumThe deposit is not creditedCheck the minimum shown in the app first
Typing the address by handA single error sends funds to the wrong addressScan the QR code
No test transferYou lose a cheap safety checkSend a small amount, at or above the minimum, first

What else should I set up in the first week?

Beyond deposits, a few habits are worth building early. Nexus Pay is not a bank, so the routine is closer to handling a wallet than an account:

  • Turn on the optional four-digit access code in the app.
  • Complete identity verification (a document and a photo) before you need a card, since issuing one requires it.
  • Remember that the card spends only the available balance, and that you can freeze and unfreeze it in one tap.
  • Plan ATM withdrawals: the fee is charged per withdrawal, so one larger withdrawal costs less than several small ones.

None of this takes long, and it removes several avoidable surprises.

Do swaps and card top-ups need the same care?

They do, though the risk is different. A swap inside the wallet costs 0% and uses the exchange rate with no markup, and the amount you receive is shown before you confirm, so read that screen. Moving money from the wallet balance to the card costs 0.1%: 1000 USDT becomes $999.00 on the card. Withdrawn at an ATM it leaves $996.50 before any fee added by the ATM owner, which appears on the ATM screen before you confirm. Looking at the preview each time is the simplest way to avoid a surprise.

Common questions

Can I get my money back if I used the wrong network?
No. A transfer sent through a different network than the address was issued for will not arrive and cannot be reversed. That is why the network must be matched before sending.
How long does a deposit take to show up?
Deposits are credited automatically after the network confirms them. Depending on the blockchain, that takes from a few minutes to about an hour.
How large should a test transfer be?
Small compared with the main amount, but not below the network minimum shown in the app. A deposit under the minimum is not credited.
Do I have to set an access code?
No, the four-digit access code is optional. It adds a layer of protection to the app, so it is worth enabling early.
Can the card spend more than my balance?
No. The card spends only the available balance, with no credit and no overdraft. You can also freeze it in the app in one tap.

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Related reading

Should you start with a small test amount? Yes, and here is whyYes, start small. A test deposit confirms coin, network and address match, and caps the cost of a mistake, since blockchain transfers can't be reversed. Why you have to choose a network when sending crypto, and what happens if you get it wrongEach coin like USDT lives on several separate blockchains. Pick the network that matches the receiving address, or funds may be lost. Here is how to check. Why a small transfer below the minimum is not credited to your balanceA transfer below the network minimum is not credited to your balance. Here is why minimums exist, how they differ by network and how to check before sending.

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