Polygon Token Spam and Bybit Wallet: How Malicious ERC-20 Tokens Hide in Your NFT Gallery

A Polygon user opens their Bybit Wallet to check an NFT collection, and the interface now displays dozens of unfamiliar tokens alongside legitimate holdings. The wallet's automatic token recognition feature, designed to simplify asset management across EVM-compatible blockchains, has imported spam tokens—some worthless, others designed to harvest wallet addresses or lure users into approval transactions. The problem is neither new nor unique to Bybit Wallet, but the scale has grown with Polygon's accessibility and the ecosystem's maturity. Distinguishing between legitimate ERC-20 tokens and malicious ones requires understanding how wallets auto-import tokens, why Polygon became a spam vector, and which filtering methods actually work.

This situation touches a real tension in wallet design. Supporting multiple blockchains and automatically recognizing thousands of legitimate tokens makes the interface more useful for active traders and collectors. The same mechanism that imports a genuine governance token or yield-bearing asset will also import scams if the wallet cannot distinguish intent from attack. Bybit Wallet's approach includes manual token management and blocking features, but they only work if users know when and how to apply them. Understanding the mechanics of token spam is therefore essential for anyone holding NFTs or trading across Polygon, BNB Chain, Ethereum, Arbitrum, or Optimism.

Why auto-recognition creates a token spam surface

Bybit Wallet's native support for EVM-compatible blockchains means it tracks balances by querying blockchain state. When a user receives a token—whether intentional or malicious—it becomes part of the wallet's address on that chain. The wallet then displays it automatically, without requiring manual addition to a watch list. This is convenient for legitimate use: receiving an airdrop, purchasing a governance token, or acquiring an ERC-20 that represents a yield position in DeFi. But convenience and security are not always aligned.

Polygon, specifically, has become a primary spam vector because its low transaction costs make spam economically feasible. Sending a worthless ERC-20 to thousands of addresses costs fractions of a cent in MATIC. An attacker can therefore generate significant reach with minimal capital. The tokens themselves range from purely decorative to actively dangerous. Some contain no code beyond the basic ERC-20 standard and simply sit in wallets, cluttering the interface. Others are designed to trigger actions. A sophisticated scam token might implement a honeypot mechanism: the contract prevents sells once purchased, or it applies variable transfer taxes that extract value from swaps.

The broader class of attacks uses token spam as a reconnaissance tool. By sending a token to a large set of addresses, an attacker learns which wallets are active. Those wallets become targets for follow-up attacks: fake airdrops in Discord, phishing links, or social engineering. An NFT holder receiving spam tokens may assume the tokens came from a legitimate airdrop or service and click a link in an attempt to claim or understand them. That link may lead to a fake wallet interface, a contract approval screen that actually permits unlimited token transfers, or a phishing site designed to harvest recovery phrases.

Bybit Wallet's design reduces some of these risks. Private key encryption, biometric authentication, and transaction previews mean that simply seeing a spam token does not automatically compromise the wallet. But the psychological pressure of an unexpected token—"why did I receive this, and should I act on it?"—can override those protections if a user is distracted or unfamiliar with the risks.

The distinction between token recognition and token vetting

An important distinction clarifies the problem space. Token recognition is the process of displaying tokens that exist at a user's address. Token vetting is the process of distinguishing legitimate tokens from scams. Bybit Wallet excels at the first task across Ethereum, BNB Chain, Polygon, Arbitrum, and Optimism through its integration with blockchain RPCs. It provides tools for the second task, but those tools require user action and knowledge.

The wallet can identify tokens by contract address and pull metadata such as name, symbol, and decimals from the contract code. It can also check whether a token is listed on major indices such as CoinGecko or a blockchain's official token registry. However, these checks have limitations. A scam token can be listed on CoinGecko if someone submits it; CoinGecko does not verify legitimacy, only format compliance. Official registries on Polygon or Arbitrum may accept submissions from anyone. A token with a legitimate-looking name, symbol, and decimal count can still be a scam if its contract contains malicious logic or if it was created by an attacker impersonating a known project.

The practical upshot is that recognition and vetting are separate problems. Bybit Wallet will recognize and display a scam token because it exists at the user's address. Whether the user understands that the token is a scam depends on additional context: Does the token have liquidity on a major DEX? Does it appear in the user's transaction history with a known sender? Has the user deliberately interacted with it, or did it arrive unsolicited? The answers to these questions cannot be automated without potentially hiding legitimate tokens.

One useful signal is transaction initiation. Tokens the user explicitly purchased, swapped, or interacted with are less likely to be scams than tokens that simply appeared. Bybit Wallet's transaction previews and history can help clarify this: if a user has no record of receiving or interacting with a token, it arrived as a cold transfer, which is a warning sign. The wallet does not currently flag this distinction automatically, placing the burden on the user to notice.

Manual token blocking and NFT gallery organization

Bybit Wallet provides mechanisms to hide or block tokens from view. Users can remove tokens from the display, customize which assets appear in the NFT gallery, and organize collections manually. These controls address the aesthetic problem—reducing clutter in the token list—but they do not address the security problem. A hidden token is still held at the address and still susceptible to contract-level attacks. Nevertheless, hiding spam improves usability and reduces the likelihood that a user will accidentally interact with a malicious contract.

The hiding process is straightforward: select a token in the wallet's asset view and choose to remove or hide it. The token remains in the user's address on-chain; removing it from the wallet view is purely a display preference. This is important because it means that if a user later realizes they want to interact with the token or transfer it, they can re-enable the view and proceed. It also means that token hiding provides no protection against automated attacks or against a user who forgets they hold the token and later approves it on a DEX without realizing what they are doing.

For NFTs specifically, Bybit Wallet's native NFT support allows manual organization. Users can organize collections by blockchain, by marketplace, or by custom categorization. This reduces the likelihood that a scam NFT or a spam token will clutter the primary NFT gallery. The distinction matters because NFTs and tokens occupy different conceptual spaces in the wallet. A token is a fungible asset that can be transferred in fractional amounts. An NFT is a discrete item with metadata and a specific contract address. Spam tokens appearing in an NFT gallery create confusion about what the user actually owns.

A practical workflow is to periodically audit the wallet after any airdrop season or after interacting with new projects. For each unfamiliar token, check whether it appears on CoinGecko, whether it has meaningful liquidity on a DEX such as Uniswap or QuickSwap, whether the user has any transaction history involving it, and whether the contract address matches the official source. If the token fails these checks, hide it. If a token appears legitimate but the user has no use for it, hiding it is still worthwhile for reducing interface clutter and lowering the cognitive load of checking the wallet regularly.

Identifying scam tokens through contract inspection

Advanced users can inspect token contracts directly using a blockchain explorer. Polygon's PolygonScan, Ethereum's Etherscan, and similar tools for Arbitrum and Optimism allow anyone to view a contract's code, its creation history, and its interactions. This level of inspection requires some familiarity with Solidity or smart contract patterns, but even non-developers can identify obvious red flags. A token contract created very recently with minimal liquidity and held by few addresses is more likely to be a scam than a token created years ago and held by thousands of addresses with significant trading volume.

Specific contract patterns indicate high risk. Honeypot contracts often have built-in conditions that prevent sells or apply excessive transfer taxes. A user can test this by attempting to simulate a transfer on the blockchain explorer's "Simulate Txn" tool, but most users will not have this technical ability. Another pattern is a proxy contract, where the actual logic is hidden behind a delegated implementation. While legitimate projects use proxies for upgradeability, scammers also use them to hide malicious behavior. A proxy with an owner address that is not a known project or a decentralized governance contract is a sign to be cautious.

The most reliable check is liquidity and trading volume. Legitimate tokens have sufficient liquidity on at least one major DEX that traders can buy and sell without extreme slippage. A scam token typically has zero or minimal liquidity on legitimate DEXs. It may exist on a fake DEX designed by the attacker or be available only through direct wallet transfers. If a user cannot find a token on Uniswap, QuickSwap (Polygon), or a major aggregator, and if the user did not deliberately create or receive it as part of a known transaction, it is almost certainly a scam.

For those looking to deepen their wallet's security posture, installation guidance and additional security best practices are available here, covering hardware wallet compatibility with Ledger and Trezor, two-factor authentication setup, and safe backup procedures.

Cross-chain token confusion and bridge exploitation

Bybit Wallet's support for cross-chain bridging and multiple blockchains creates an additional confusion surface. A token named "USDC" exists on Ethereum, Polygon, Arbitrum, and Optimism, but these are technically different contracts. A user could receive a fake USDC-like token on Polygon while holding legitimate USDC on Ethereum, and confusing the two could lead to sending tokens to the wrong address or attempting to swap on a DEX that does not support the token. The wallet displays tokens grouped by blockchain, which reduces this risk, but the visual similarity can still trick a distracted user.

Scammers exploit this by creating tokens with nearly identical names to legitimate cross-chain assets. A token named "USDC.e" on Polygon might appear legitimate because Ethereum-native tokens sometimes use ".e" suffixes to denote wrapped or bridged versions. But if the token is not listed on the official bridge or on major DEXs, it is likely a scam. The protection here is to verify that any token a user intends to trade is the exact token they researched, not a similarly named copy.

Bybit Wallet's transaction previews help with this: before signing any transaction, the user sees the destination address, the token being transferred, the amount, and the network. Comparing this preview to the intended action—"Am I selling USDC on Polygon, or was I trying to move USDC on Ethereum?"—catches most mistakes. But the protection only works if the user reads and understands the preview. Approving transactions quickly or in a distracted state defeats this safeguard.

For users who frequently bridge tokens between blockchains, maintaining a mental model of which token is which is essential. Labeling addresses in the wallet—marking one as "Polygon USDC destination" or "Ethereum only"—can reduce the likelihood of cross-chain errors. Bybit Wallet supports address labeling through its contact or address book feature, making this a practical approach to organizing bridges and counterparties.

Behavioral practices that reduce token spam exposure

The technical features of a wallet are only one layer of defense. Behavioral practices determine whether those features are effective. The first practice is skepticism toward unsolicited tokens and airdrops. If a token arrived without the user sending a transaction or interacting with a contract, it was either a legitimate airdrop from a project the user is connected to or a spam token. The user can verify by checking whether the project announced an airdrop, whether they are eligible based on their activity, and whether the token address matches the official source. If none of these checks pass, it is a scam.

The second practice is never clicking links associated with unexpected tokens. A common attack flow is: attacker sends a token, user receives it, user searches for information about the token online or clicks a link in a Discord message promising to explain the token, user lands on a phishing site and approves malicious transactions or enters a recovery phrase. By default, any link promising to help with an unexpected token should be assumed to be malicious. Instead, users should independently verify the token on the blockchain explorer and major crypto information sites.

The third practice is to separate trading wallets from long-term storage wallets. A wallet used to interact with new projects, unknown DEXs, or experimental DeFi protocols will accumulate more spam and face higher attack exposure than a wallet used only for storing known assets and making occasional high-value transfers. This separation is practical using Bybit Wallet's support for multiple wallets or by using hardware wallet features for cold storage and keeping only a small hot wallet on the mobile or Chrome extension version.

The fourth practice is regular audits. Once a month or after any new project interaction, reviewing the wallet's token list, removing tokens with no liquidity or purpose, and verifying that the NFT gallery contains only collections the user recognizes will prevent spam accumulation from reaching unmanageable levels. As the wallet matures and the number of tokens grows, this audit becomes increasingly important for usability and security.

The limits of wallet-level defenses against token spam

It is important to acknowledge what wallet features cannot do. Bybit Wallet cannot prevent a user from receiving a scam token, because token transfers are broadcast transactions on the blockchain that the wallet cannot intercept. A scammer can send any ERC-20 or ERC-1155 token to any address, and that transaction will succeed regardless of whether the receiving user wants it. The wallet can only display, hide, or allow the user to block interaction with the token after the fact.

The wallet also cannot prevent a user from approving a malicious token contract if the user chooses to do so. Bybit Wallet's transaction previews show what a user is approving, but if a user is deceived into thinking the approval is legitimate—through a phishing site, a fake interface, or social engineering—the wallet cannot stop them. The protection is informational and relies on the user's attention and knowledge. The wallet can make the information visible, but it cannot enforce understanding.

Additionally, wallet defenses cannot distinguish between a scam token and a legitimate but low-value token that a user received as part of a campaign. A token with zero liquidity and no official website might be either. CoinGecko listings, contract age, and social signals help, but they are heuristics rather than definitive proof. Users must ultimately exercise judgment based on multiple sources of information.

Looking forward, the most promising approach to reducing token spam is ecosystem-level rather than wallet-level. If major DEXs and block explorers implement stricter listing requirements, if token standards include better metadata about legitimacy, and if projects use verified sources for airdrops, the overall spam burden could decline. Until then, individual wallets and users must manage the existing noise. Bybit Wallet's tools are well-designed for this task, but they require active engagement rather than passive protection.

Practical steps for a clean NFT gallery and token list

A user who finds their Bybit Wallet cluttered with spam can follow a systematic approach to restore order. First, create a list of all tokens and NFTs currently in the wallet by taking screenshots or exporting the portfolio view. Second, for each token, check whether it appears in the user's transaction history. Tokens with no history are almost certainly spam. Third, verify legitimate tokens by checking them on CoinGecko, their official website, and a blockchain explorer. Fourth, hide or block all tokens that are not recognized as legitimate.

For the NFT gallery specifically, verify each collection by checking the creator address and comparing it to the official website of the project. Counterfeit NFT collections are common on Polygon because of its low fees and Bybit Wallet's native NFT support. A collection that claims to be from a well-known project but has a suspicious creator address or zero trading volume is almost certainly a scam. Hiding or removing these collections improves the gallery's utility and reduces the likelihood of accidentally listing or transferring a fake NFT.

Once the wallet is cleaned, implement the behavioral practices described above: maintain skepticism toward unsolicited tokens, never click suspicious links, audit the wallet periodically, and consider separating active trading wallets from long-term storage. For higher-value holdings, using Bybit Wallet's hardware wallet compatibility with Ledger or Trezor provides an additional layer of protection by keeping private keys offline and requiring physical confirmation of high-value transactions.

The maintenance burden of managing token spam is real, but it is manageable with the right practices. Bybit Wallet's interface and features provide the necessary tools. Success depends on understanding the threat model—that spam tokens are inevitable in an open blockchain ecosystem, that automatic hiding is available and effective, and that the user's attention to transaction details and selective skepticism toward unexpected assets remain the strongest defenses.