Catch purchases split to dodge manager approval.
Three $490 charges to one vendor in a day are each under a $500 limit. Together they are $1,470 nobody approved.
Split cluster SC-0311
Ines Barros, Regional Director
Northline Print & Sign, Ramp card ending 0912
- Mon 09:12INV-20418$490.00
- Mon 13:36INV-20419$490.00
- Mon 21:48INV-20420$490.00
Sequential invoice numbers, identical line items: 500 trifold brochures each.
Move the limit. Change the window. Watch clusters appear.
Seventy-two hours of card activity for one cost center. Drag the approval threshold or widen the velocity window to see which charges group into a split.
Velocity window
- Split cluster3 charges at Northline Print & Sign by Ines Barros, $1,470.00 totalMon 09:12 to Mon 21:48, each under $500.00
How a split is recognized
Approvers see one charge at a time, each comfortably under the limit. Phyto Nex AI sees the sequence. Five passes run on every new charge.
- 1
Group
Charges are grouped by normalized vendor, then by buyer and by cost center, across every card and expense source.
- 2
Window
A sliding window (24, 48 or 72 hours, or a custom span) runs over each group in time order.
- 3
Band
Charges between 80% and 99.99% of the approval limit are marked as near-threshold.
- 4
Sum
When two or more near-threshold charges in one window sum past the limit, the cluster is raised.
- 5
Context
Sequential invoice numbers, identical line items and same-day shipping addresses raise confidence.
Vendor velocity, last 30 days
Velocity compares each vendor's charge rate with its own 90-day baseline. A jump paired with a high near-threshold share is the pattern to look at first.
| Vendor | MCC | Charges | Median | Near-threshold share | Velocity vs 90d | Status |
|---|---|---|---|---|---|---|
| Northline Print & Sign | 7338 Quick copy | 7 | $490.00 | 71% | +340% | Split cluster |
| B&H Photo | 5732 Electronics | 4 | $449.99 | 50% | +120% | Watch |
| Amazon Business | 5942 Book stores | 38 | $64.18 | 8% | +12% | Normal |
| Staples | 5943 Office supply | 11 | $112.40 | 0% | -6% | Normal |
| Eventbrite | 7922 Theater tickets | 3 | $475.00 | 100% | +200% | Watch |
| WeWork | 6513 Real estate | 6 | $385.00 | 0% | +0% | Normal |
Everything AP needs to decide, on one screen
Northline Print & Sign, weekly spend
12 weeks
Ten weeks averaging $232, then $1,470 and $1,555 in consecutive weeks, all in charges under $500.
Suggested next step
Ask for the brochure order context and a PO going forward
Draft ready, neutral tone, cites purchasing policy 7.2. Waiting for AP approval.
Historical context
Same buyer, same vendor: one prior cluster in March, resolved as an event deposit and balance. Dismissal note shown inline.
Policy reference
Purchasing policy 7.2: orders over $500 to a single vendor within five business days require manager approval or a purchase order.
Split-transaction questions
Yes. A vendor may invoice a deposit and a balance, or a team may genuinely need two orders. That is why Phyto Nex AI flags clusters for review rather than treating them as violations, and why the drafted message asks for context instead of assuming intent.
Any limit you define: manager sign-off, pre-approval, purchase card single-transaction limits, or procurement thresholds that should have triggered a PO. Each can have its own window and near-threshold band.
Yes, optionally. Coordinated splits, where two people on the same team each buy just under the limit from the same vendor, are grouped by cost center as well as by buyer.
The default band is 80% to 99.99% of the limit. Charges far below the limit rarely indicate evasion, so they only count toward a cluster when they push the total past the threshold with another near-limit charge.
Stop playing expense police. Put policy enforcement on autopilot.
Connect Phyto Nex AI to your expense tool in 15 minutes and see what slipped past managers this month.
14-day free production trial. Read-only connectors. No card required.