Collect every open invoice, lose none of the cash.

Section 01

Why AR separation is about the cash.

An accounts receivable TSA covers invoicing, cash application, collections, credit control, and dispute management. During the term the seller runs this order to cash process on its ERP and through its bank accounts, and the buyer pays a service charge. Where accounts payable risk is about paying twice, receivable risk is about not getting paid at all, or getting paid into the wrong account. The cash that flows through AR is Newco's working capital, and any of it that goes astray is real money lost.

The core problem is that customers pay where the invoice tells them to. Open invoices issued before the carve-out carry the seller's bank details and remittance instructions. Customers keep using them out of habit long after the cutover, and the cash lands in the seller's lockbox rather than Newco's account. Recovering that money depends entirely on a cooperative seller and a clean tracking process, neither of which can be assumed.

For these reasons AR separation is planned around the flow of cash, not just the migration of a system. The buyer maps where every payment currently lands, where it needs to land, and how to redirect it without confusing the customer or breaking a relationship. Done well, the customer barely notices. Done poorly, the buyer spends months chasing cash it has already earned.

Section 02

Splitting the customer master.

The customer master is the AR equivalent of the vendor master, and it carries the same risks. The seller's file mixes customers of the retained business, shared customers, and customers unique to the carved-out unit. The buyer needs the subset that belongs to Newco, with credit limits, payment terms, tax registrations, and billing contacts intact. Shared customers are the hard case, because the same buying entity may owe money to both the seller and Newco, and the invoices must be assigned cleanly to avoid collection confusion.

The buyer should validate the extract rather than trust it, paying particular attention to credit limits and payment terms that protect working capital. Duplicate customer records should be resolved before migration, and the open invoice detail must tie exactly to the receivables balance in the ledger. A customer master that does not reconcile to the aged receivables report is a separation that will leak cash, because invoices that exist in one place but not the other are invoices nobody collects.

Once the master is clean, the buyer freezes new customer setups during the cutover and routes them through a controlled process. The customer master also feeds revenue recognition and the close, so it should move in step with the wider finance separation rather than as a standalone AR task. That coordination is set out in the TSA month end close coordination.

Section 03

Redirecting remittance.

Remittance redirection is the heart of AR separation. New invoices issued by Newco carry the new bank details, but the open book still points at the seller. The buyer runs a deliberate communication to customers, confirming the new remittance instructions through trusted channels, and follows up with the customers who keep paying the old account. This is a relationship task as much as a finance task, because a clumsy redirection that looks like a phishing attempt will be ignored or escalated by a cautious customer.

For the cash that still arrives at the seller during the transition, the TSA should require a daily or weekly sweep. The seller identifies payments belonging to Newco, remits them promptly, and provides the remittance detail so the buyer can apply the cash correctly. Without this obligation written into the service, the buyer is exposed to a slow or uncooperative seller sitting on its working capital. The sweep mechanism, the timing, and the remittance reporting should all be specified rather than assumed.

Cash application is the other half. Payments must be matched to the right open invoices, and during the transition that matching spans two systems. Unapplied cash is cash that looks missing even when it has arrived, and it distorts both the aging and the collections effort. The buyer builds a clean cash application process before the cutover and reconciles unapplied items daily, so the receivables picture stays accurate while the book is moving.

Section 04

Collections during the transition.

Collections cannot pause while the separation happens, or the aging deteriorates and cash slows exactly when Newco needs it most. The TSA should make clear who chases each open invoice during the transition. The cleanest model is that the buyer owns the carved-out receivables and the seller provides collection support under the service, remitting any cash it receives. Whatever the model, it must be explicit, because a slow paying customer that nobody is chasing becomes a write off that nobody anticipated.

Disputes and credit memos need a clear owner too. A customer that disputes an invoice issued before the carve-out will contact whoever it dealt with before, usually the seller, and the resolution affects Newco's cash. The buyer should require the seller to escalate disputes promptly and should retain the authority to approve credits on its own receivables. Letting the seller resolve disputes unilaterally on Newco's book invites unnecessary concessions that come straight out of the buyer's working capital.

Throughout the transition the buyer watches the aged receivables and days sales outstanding closely. A rising DSO during separation is an early signal that cash is being misapplied, redirection is failing, or collections have stalled. Tracking the aging weekly and tying it to the open payables and ledger work keeps the whole financial separation honest, and connects directly to the TSA general ledger cutover where the final balances land.

Section 05

Exiting on the collection cycle.

AR takes a little longer to exit than AP because the constraint is the collection cycle. Open invoices issued before the cutover take time to clear, and the buyer cannot fully switch off the service until that legacy book is substantially collected or formally transferred. The buyer plans the exit around the aging of the receivables rather than a generic term, and accelerates collection of the oldest invoices so the tail does not extend the dependency on the seller.

The exit should be milestone driven. The conditions are a clean and reconciled customer master, redirected remittance with the bulk of cash arriving in Newco's accounts, a working order to cash process running in parallel, and the legacy receivables substantially cleared. When those are met, the service is switched off and the final reconciliation confirms no open invoice has been left behind. Where the term or charge is unreasonable for the collection profile, it is a candidate for renegotiation rather than passive acceptance.

AR separation done with discipline protects the working capital that makes the carve-out viable. The buyer that maps the customer master, plans the remittance redirection, and owns collections from Day One exits with its cash intact. The buyer that treats AR as a routine system migration finds out, one misapplied payment at a time, that the cash was the whole point.

FAQ

AR separation questions buyers ask.

What does a TSA accounts receivable service cover?

It typically covers invoicing, cash application, collections, credit control, and dispute management, run on the seller's ERP and bank accounts. The buyer pays a service charge while it stands up its own order to cash process and redirects customer remittance to its own accounts. The aim is to collect every open invoice and exit on schedule.

What is the biggest risk in separating accounts receivable?

Cash going to the wrong place or being misapplied. Customers keep paying the bank account printed on old invoices, and cash for Newco lands in the seller's lockbox. A planned remittance redirection, a clear cutoff for open receivables, and a daily sweep of misdirected cash are the controls that protect collections.

Who collects the receivables outstanding at cutover?

Decide it in the TSA. The cleanest model is that the buyer owns the carved-out receivables and the seller provides collection support during the transition, remitting any cash it receives. Leaving ownership undefined produces disputes over who chases a slow paying customer and where the cash belongs.

How long should the AR TSA run?

Long enough to migrate the customer master, redirect remittance, and run the order to cash process in parallel, usually a few months. The constraint is the collection cycle, since open invoices take time to clear. The buyer plans the exit around the aging of the receivables, not around a generic term.

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