An agency may receive client cash before buying media, then spend across platforms, campaigns, currencies, and billing periods. Without a client-level rollforward, unspent funds can be confused with agency revenue or one client’s cash can appear to fund another campaign.
The goal is not to force every number to zero. It is to explain each movement using the records the business is authorized to use, distinguish timing from a real discrepancy, and put decisions in front of the right reviewer. That makes the work suitable for offshore bookkeeping support: the preparer handles repeatable evidence work while the company retains authority.
Useful background for designing the procedure includes FTC digital advertising guidance and IRS recordkeeping guidance. These sources do not replace the company’s contracts, accounting policy, or professional advice. Record the version and access date when a changing rule or provider document affects the workflow.