NOWPayments and BlockSec Release Security Checklist for Crypto Payment Systems

Crypto payment gateway NOWPayments and blockchain security firm BlockSec have jointly published a comprehensive checklist for security and technical compliance in digital asset payments. The guide is designed to help businesses strengthen their defenses against common threats like key compromise, fraudulent transactions, and account takeovers.

A New Framework for Payment Security

The free resource provides a detailed list of 25 controls organized across nine distinct categories. It aims to translate broad security principles into actionable steps that a company's security, operations, and compliance teams can implement and verify.

According to the announcement, the key areas covered by the checklist include:

• Private key and wallet security
• Smart contract security
• On-chain monitoring and incident response
• AML/CFT technical compliance
• Stablecoin freeze risk management

The framework is intended for use during initial setup, vendor reviews, or regular internal security assessments, allowing teams to identify control gaps and assign ownership for remediation.

Mitigating Irreversible Risks

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The initiative addresses the unique challenges of the crypto space, where transactions are final and irreversible. A single security lapse can lead to a permanent loss of funds, a risk that distinguishes digital asset payments from traditional finance.

“The most common mistake is to treat a crypto payment like a normal online payment. On-chain transfers are final, so weak key management, unreviewed transaction approvals, or thin compliance checks can turn one mistake into a permanent loss,” said Andy Zhou, co-founder of BlockSec, in the release.

Context for Businesses and Investors

The checklist is targeted at a wide range of businesses, including merchants, online marketplaces, gaming platforms, and SaaS companies that are either accepting crypto or planning to. By providing a shared framework, the guide helps bridge potential gaps between engineering, compliance, and operations departments before they become critical vulnerabilities.

Zhou also highlighted the importance of real-time monitoring for effective incident response. “Real-time visibility is what makes a fast incident response possible. It can be the difference between containing a loss and losing funds to swaps, bridges, or cash-out points,” he stated. The companies clarified that the checklist is an educational resource and not a replacement for formal certification or legal advice.