HDCPA Professional Corporation and IntegriServ Consulting Ltd. are independent firms that work collaboratively to deliver high-quality, cost-effective audit, assurance and consulting solutions, with deep specialization in Extended Producer Responsibility (EPR) and environmental stewardship programs.

Together, their professionals bring decades of experience supporting producers, producer responsibility organizations and stewardship programs across Canada. Their services include supply data verifications, performance audits, revenue compliance reviews and sustainability reviews across product categories such as tires, electronics, lighting, batteries, hazardous and special products, and blue box (packaging) materials. They also help organizations navigate evolving EPR requirements across various jurisdictions in North America and beyond, including reporting obligations and related verification procedures.

HDCPA contributes licensed third-party audit and assurance expertise, while IntegriServ brings extensive internal audit, compliance, performance improvement and risk advisory capabilities. Both firms are guided by integrity, service, collaboration and a practical understanding of their clients’ goals.

By combining technical expertise with a responsive, client-focused approach, HDCPA and IntegriServ help organizations strengthen compliance, improve accountability, recover under-remitted fees and support the long-term effectiveness of EPR, recycling and stewardship systems