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July 24, 2026, 11:21:58 AM |
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In recent weeks, cryptocurrency exchanges have increasingly begun rejecting Solana (SOL) transactions flagged by the blockchain risk monitoring service AMLSol.live. The development signals a significant tightening of anti-money laundering (AML) compliance across the industry, as platforms move to screen transactions in real-time against risk databases before finalizing settlements.
According to data cited by AMLSol.live, approximately 20% of all cryptocurrency wallets exhibit elevated risk characteristics in their transaction patterns. This poses a substantial compliance challenge for exchanges, where one in five wallets potentially presents a red flag through exposure to mixers, darknet markets, sanctioned entities, or other high-risk activities. Exchanges operating under frameworks like the EU's MiCA regulation—which entered full enforcement in June 2026—are under increasing pressure to implement continuous AML monitoring, rather than relying on one-time address checks at onboarding.
Why Solana Transactions Are Being Targeted
The Solana blockchain, known for its high throughput and low transaction costs, has become a preferred infrastructure for DeFi and Web3 applications. However, these same features have also exposed the network to bot spamming and financial exploitation, contributing to a high transaction failure rate of 58.43% among bots and a prevalence of failed transactions overall.
For compliance teams, Solana presents a multi-chain challenge. Stablecoins like USDC and USDT are natively issued across multiple blockchains, including Solana, and risk does not stay confined to one chain. An address that appears clean on Ethereum may route high-risk funds through Solana if not monitored continuously. Regulators now expect chain-of-custody evidence: exchanges must maintain audit trails showing what was screened, against which list version, and when a transaction was held or rejected.
How the Screening Process Works
Modern AML screening operates on a Identify → Screen → Score → Act workflow. When a user initiates a Solana transaction, the exchange's compliance pipeline extracts counterparty wallet addresses and runs them through blockchain analytics tools in real time. Each address receives a risk score based on its on-chain history—exposure to mixers, ransomware, fraud-linked addresses, or OFAC-sanctioned entities.
Low risk (0–25): Clean history; proceed normally.
Medium risk (26–74): Enhanced due diligence required; may request source-of-funds documentation.
High risk (75–100): Transaction flagged or blocked pending investigation.
What This Means for Users
For ordinary Solana users, a rejected transaction does not automatically mean criminal activity—it means the monitoring tool has found transaction history it considers risky based on its dataset. Common reasons for false positives include receiving funds from an exchange with poor AML controls, indirect exposure to peer-to-peer platforms, or outdated entity attributions in screening databases.
Users whose transactions are rejected are advised to request the specific reason from the exchange, gather source-of-funds documentation (bank statements, exchange withdrawal records, payroll records), and submit a formal dispute through official channels if the flag appears to be a false positive.
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