What's the difference between aged debtors and aged creditors?

Debtors are customers who owe you money — unpaid sales invoices. Creditors are suppliers you owe money to — unpaid bills. Both reports use the same aging buckets (Current / 1–30 / 31–60 / 61–90 / 90+) but flipped: high aged debtors means chase your customers; high aged creditors means either a cash crunch, or you're holding suppliers too long and damaging relationships. Run both side by side to read your working-capital position — debtors minus creditors is roughly the net AR/AP swing.