How to Pass Client Security Due Diligence as a Vendor

The Deal That Almost Slipped Away

The proposal was accepted. Pricing was approved. Then came the security questionnaire.

Thirty questions about encryption, access controls, incident response, data retention, and backups. The deal stalled for weeks because the vendor did not have documentation ready.

For many Québec SMBs, security due diligence is no longer optional. Buyers now require proof that suppliers protect data properly before contracts are signed.

What Clients Typically Ask For

Even when buyers do not require formal certifications like SOC 2, their questionnaires often use similar language. Common requests include:

• Written information security policy
• Access control and password standards
• Multi-factor authentication confirmation
• Backup and disaster recovery procedures
• Incident response plan
• Vendor risk management policy
• Evidence of employee security training

Many SMBs already have these controls in practice. The problem is documentation.

The Minimal Viable Documentation Bundle

You do not need enterprise-level compliance to pass most client reviews. You need a structured documentation bundle that demonstrates maturity.

A minimal package should include:

• Information Security Policy
• Acceptable Use Policy
• Password and MFA Standard
• Backup and Recovery Summary
• Incident Response Overview
• Data Handling and Retention Statement

This bundle should be clear, concise, and aligned with your actual technical setup.

Technical Quick Wins That Strengthen Your Answers

If documentation exists but controls are weak, questionnaires become risky. The fastest improvements most SMBs can make include:

• Enable MFA for email and remote access
• Implement structured 3-2-1 backups
• Turn on centralized logging
• Apply regular patch management
• Formalize employee security awareness training

These improvements are often delivered through a structured cybersecurity program rather than ad-hoc tools.

How AET Solutions Helps Vendors Close Deals

AET Solutions works with Québec SMBs to close security gaps before they affect revenue.

We help:

• Review and complete security questionnaires
• Build missing documentation
• Align technical controls with written policies
• Provide letters of attestation confirming implemented safeguards

Security readiness is no longer just IT hygiene. It is revenue protection.

Frequently Asked Questions

Do small vendors really need formal security documentation?
Yes. Even mid-market buyers now require proof of security practices.

Is SOC 2 required?
Not usually for SMB vendors. Most buyers accept structured documentation and evidence of controls.

How long does preparation take?
With existing controls in place, readiness can often be achieved within weeks.

Next Step Due Diligence Readiness Session

AET Solutions offers a due diligence readiness session to help vendors prepare documentation and strengthen technical controls.

👉 Book a readiness session and receive our one-page security due diligence checklist.