Canadian sole-practitioner accounting firm documents cyber posture before an associate transition.

A Canadian sole-practitioner accounting firm engaged LeakTrace to document cyber posture ahead of transitioning the client roster to a newly-associated Chartered Professional Accountant. The engagement produced the reference material the incoming CPA used to assume the roster with documented compliance context.

Engagement origin

The firm operates a sole-practitioner accounting practice serving corporate and high net worth individual clients in one Canadian province. The sole practitioner had partnered with a newly-associated CPA who would take on primary client relationships in advance of the sole practitioner's planned partial retirement. The sole practitioner engaged LeakTrace on the recommendation of outside counsel to establish the exposure baseline the incoming CPA would inherit.

Discovery scope

LeakTrace conducted an external attack surface audit against the firm's registered domain, the sole practitioner's business patterns, public directory records associated with CPA Canada registration, and vendor mapping.

Findings summary

• Sole practitioner credential exposure. The sole practitioner had personal email exposure in monitored breach databases with reuse patterns extending into the firm's tax preparation platform and client portal.
• Client portal legacy access. Several former client relationships retained active credentials in the client portal. The retention was standard for the sole practitioner's practice but represented an inherited-exposure surface the incoming CPA should address.
• Tax preparation platform vendor. The vendor had received public security guidance the sole practitioner had not applied.
• Business email authentication. The firm's Sender Policy Framework and Domain-based Message Authentication configuration required minor adjustment to meet the incoming CPA's professional practice baseline.

Practice actions

The sole practitioner executed remediation before the associate transition completed. Credentials were rotated across all identified exposures. Legacy client access was audited and terminated where relationships had lapsed. The tax preparation vendor's guidance was applied. Business email authentication was revised. The incoming CPA reviewed the baseline as part of the transition documentation.

Outcome

The client roster transition completed on schedule. The incoming CPA assumed primary client relationships with documented cyber posture as reference material. The sole practitioner retained LeakTrace for standing continuity support through the partial retirement period.