Invoices can carry blocks (disputes, missing approvals, price/quantity holds, blocked vendors) that exclude them from runs until cleared. AP monitors held items so they don't age unnoticed, resolves the underlying issue, and releases them into a later run. Clear block reasons and ownership prevent both wrongful payment and undue delay.
Real-world example
A price-dispute block keeps an invoice out of the run until the buyer agrees the price, then it's released to pay.
Invoice Processing
Aging Analysis
Payment Runs