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Use case

Accounts receivable automation for B2B SaaS

For B2B SaaS, late and failed payments quietly become churn. Welldun chases every overdue and failed subscription invoice across email, WhatsApp, and voice — in your brand voice — and applies the cash automatically.

Updated June 2026Accounts receivable

In short

  • High invoice volume and failed card payments make manual chasing impossible at scale.
  • Unresolved late payments turn into involuntary churn, not just DSO.
  • Welldun works every overdue invoice autonomously and applies cash on arrival.
  • Set different cadences per plan tier in plain language.

The AR challenge in B2B SaaS

SaaS billing produces a constant stream of recurring invoices and a steady trickle of failed payments — expired cards, insufficient funds, ACH returns. Each one is small, so none gets prioritized, and collectively they become involuntary churn: revenue lost not because the customer left, but because a payment quietly failed and nobody followed up.

Finance teams can’t hand-chase thousands of small balances, so the dunning either doesn’t happen or fires blindly even after a customer has paid.

What Welldun does for SaaS teams

Welldun works the entire overdue and failed-payment queue on its own. It follows up across dunning channels (email, WhatsApp, voice), reads replies, and adapts — pausing the moment a customer pays or raises an issue. You write the collection strategy per plan tier in plain language; the agent follows it.

When payments land, cash application clears the right invoices automatically, so your records and your dunning stay in sync and no paying customer ever gets a past-due notice.

The outcome

Consistent, automated follow-up recovers failed payments before they become cancellations, lowers DSO, and frees finance from manual dunning — without adding headcount as you scale.

Frequently asked questions

Can Welldun handle high volumes of small subscription invoices?

Yes. Welldun is built to work the entire queue autonomously, so it follows up on every overdue or failed invoice regardless of size, prioritizing by exposure and stopping as soon as an invoice is paid.

See Welldun work on your ledger

Welldun chases overdue invoices across email, WhatsApp, and voice, and applies incoming cash to the right invoices automatically — so your DSO falls without the manual chase.

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Related

Dunning · Cash application · DSO · Dunning automation guide · All industries