The former head of Toronto advertising agency Echo Advertising & Marketing Inc. told a Toronto court Thursday it was not uncommon for his firm to move large invoices for clients such as Livent Inc.

Legal teams are moving invoice data beyond review and approval and using it to shape decisions, rate negotiations, benchmarking and risk analysis, said panelists at CLOC Global Institute in Chicago.

Every invoice contains information that can affect tax compliance, yet the tax rules required to validate it often reside ...