Chase the approval, not the invoice
When the blocker is a timesheet or a purchase order, that is what the agent goes after.
IT services and system integrators
Unapproved timesheet, purchase order to renew, supplier portal to feed: the Billabex agent follows those steps for you, engagement by engagement.
Time and materials billing depends on a monthly approval. If the timesheet is not signed off, if the purchase order is exhausted or expired, the invoice still goes out but will not be paid. And the same blocker returns the following month.
The agent follows up on the step that actually blocks, restates what is expected and tracks the file until it moves. Your delivery managers stay on delivery.
When the blocker is a timesheet or a purchase order, that is what the agent goes after.
One client, several engagements: each invoice keeps its own context and contact.
A predictable blocker beats a confirmed unpaid invoice: it surfaces while there is still time.
Time and materials billing is cyclical; so are the reminders, with no effort from you.
See on your own invoices what the agent understands from a customer reply, and what it does with it.