GDS invoice audit that checks every billed segment, not a sample, and follows every disputed dollar to its credit
Every billed segment checked against its booking and contract; every overcharge disputed.
See one case, screen by screen ↓A GDS invoice audit checks that every segment a GDS billed the airline was a real, billable booking at the contracted rate, and disputes what was not. GDS Invoice Audit does it for every segment, not a sample: eight agents tie the invoice to its segment file to the cent, check each billed segment against the airline's bookings and the agreement, argue the GDS's side, and draft the dispute for distribution finance to approve and sign.
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A GDS invoice audit is meant to check every segment a GDS billed. Every month each GDS bills the airline a booking fee for every net segment its subscriber agencies booked, and a network carrier receives invoices of hundreds of thousands of segments, each backed by a segment billing file (the BIDT) with one row per billed segment. Distribution finance downloads the file, attempts the GDS booking fee reconciliation in a spreadsheet that cannot open 600,000 rows, samples a few hundred locators, looks each one up in the reservations system's history and reads the fee schedule and billable-segment rules by hand.
What a sample misses gets paid in full: passive segments entered to print an itinerary, churned and duplicate bookings, cancellations never credited, the airline's own schedule changes billed a second time, and NDC orders billed at the EDIFACT rate. Disputes without per-line proof come back rejected, accepted credits are never matched to a later invoice, the dispute window lapses, and the contract is renewed without the year's facts.
Estimated split for one GDS invoice a month at a network carrier, by hand and with the solution.
Eight agents check every billed segment, argue the GDS's side and draft the dispute; distribution finance approves and signs.
Kestrel GDS sends Corvane Airways its September invoice, KG-2609-0412: $2,838,208.20 for 612,204 segments, arriving Wednesday at 18:20 with its segment file. Here is the GDS invoice audit that follows, screen by screen, in the working solution.
Dana's Today screen opens on the night's work: 2 of 3 September invoices checked, $96,156.95 caught in September (2.16% of $4,442,326.80 checked) and $125,888.10 still owed to Corvane. The lead item reads “Kestrel billed $2,838,208.20 for September; $64,754.80 should not have been billed.” Beside it, the audit agents report in their own words, and she can ask them anything.
Second-look checker: “I argued Kestrel’s side on every catch. I cleared 318 I could not defend — two travelers with the same name, a group name list — and held 96 for you where I disagree with the pattern finder.”
The invoice ties to the segment file to the cent: 416,310 EDIFACT segments at $5.50 and 195,894 NDC segments at $2.80. Below it, the invoice falls through five layers — matched to a Corvane booking, passive and churned, duplicates, canceled and changed by us, at the contract's rate — each with what it caught in segments and dollars. Passive and churned alone is 3,412 segments, $18,766.00.
The foot of the sieve always adds up: $2,772,925.40 payable + $64,754.80 disputed + $528.00 held for you = $2,838,208.20.
One click replays the run. The invoice reader tied out the file at 18:24. The booking matcher matched 611,018 of 612,204 segments to Corvane's booking history; 1,186 had no Corvane booking — 774 partner-marketed codeshare, 412 from Kestrel's training office. The pattern finder found passive, churned and duplicate segments, the contract checker applied the rates and credits, and the second-look checker tried six innocent explanations before the dispute drafter wrote the letter.
“Handed to Dana Whitfield: the dispute to approve and 96 held segments to decide.”
Dana asks the layer in plain words. The pattern finder answers with the booking itself: K7QX2M was ticketed through Corvane's NDC channel on Sep 2, and six minutes later Lakeshore Travel added a GK segment in Kestrel to print the itinerary. Schedule C-2 says passive segments are not billable. Above the question, what the second look cleared in this layer: 114 segments, $627.00, a group name list under contract GRP-2611.
Every sentence the agents write carries a numbered citation that opens its source.
Segment S-20417 — HALVORSEN/E MS on CV 1182 ORD–DEN, Fri Sep 18, Lakeshore Travel Group office 7KQ2, status GK, billed $5.50. Beside the billed line, what Corvane's booking history shows and what the contract says: billed $5.50, should be $0.00. The churn sample reads the same way: SMITH/J MR on CV 220 ORD–SEA, seven cancel-and-rebook cycles in 41 hours from Harborview Tours, cycles 4 to 7 not billable under Schedule C-5, 8 segments, $44.00.
Second-look checker: “I tried the innocent explanations — a ticket issued in Kestrel, an active segment re-entered as passive. None applies. I agree.”
Corvane Vacations, office 4CVA, rebooks while it builds packages: the pattern finder says churn, the second look says the office is Corvane's own, so the cause is Corvane's to fix. $528.00 is at stake. Dana keeps them payable with the reason “Our own office — fix the booking practice instead” and signs; the pattern goes to Corvane Vacations to fix.
Second-look checker: “I say the contract counts any office, but disputing our own booking practice may cost goodwill before the renewal. $528.00 is at stake. You decide.”
Under Section 9.2 of the Participating Carrier Agreement of April 1, 2024, the letter disputes $64,754.80 in eight paragraphs, each with its count, clause and dollars. The largest is the booking fee: 6,420 segments held as NDC orders and billed on the EDIFACT line at $5.50, where Schedule B-2 as amended on March 1, 2026 says $2.80 — $17,334.00. The evidence file lists all 15,097 lines with their booking history.
Dana can ask the drafter back: “Make the passive paragraph firmer”, “Add the August rejection to this letter”, “What will Kestrel push back on?”
The dispute is inside Dana's $100,000 limit, so she approves it with the reason “Contract applied as written” and her e-signature. Accounts Payable is told to pay $2,773,453.40 by Wed Nov 11 and withhold $64,754.80, as Section 9.4 allows. The dispute goes out the morning after the invoice, with the window open to Fri Dec 11.
Nothing leaves unseen: the dispute drafter never sends — a person approves and signs.
For August, Kestrel accepted $40,118.25 — credit note CN-KG-0926-131, expected on the October invoice — and rejected $21,362.00 for 3,884 passive segments as “later ticketed”. The credit tracker found no such exception in Schedule C-2 and drafted the rebuttal for Dana to approve. Strata's answer on $33,005.70 is 5 days overdue. Across the last 12 months $722,890.15 was credited, 92.5% of what was disputed, and Kestrel credits in 41 days on average.
“Schedule C-2 reads: passive segments ‘are not billable’. It makes no exception for ticketing.”
The September close lists every invoice with what to pay, what to withhold and when it is due, for Joanne to approve. The accrual is drafted from the same numbers: $5,054,774.70 billed by three GDSs, $96,156.95 disputed and held, a credit expected at Kestrel's 92.5% acceptance rate, and $4,965,829.52 of GDS distribution expense to accrue. Marcus Ellery signs the close.
“Finance posts it; the agents never post to the ledger.”
The same GDS invoice, seen by the five people who carry it — what their month looked like, and what it looks like now.
Eight agents check every billed segment, argue the GDS's side and draft the dispute; distribution finance approves and signs.
Reads each GDS invoice and its segment file, ties them to the cent, and stops on a layout change or a duplicate invoice.
Matches every billed segment to Corvane's booking history by locator, name, flight, date and office, against the codeshare schedule.
Finds passive segments, cancel-and-rebook chains and duplicates across bookings.
Applies each GDS agreement: tiers, the NDC rate, cancellation credits and the schedule changes Corvane made.
Argues the GDS's side on every catch — two travelers with the same name, a group name list, cycles more than 72 hours apart — and clears what it cannot defend.
Drafts the dispute letter by clause, the evidence file and the pay and withhold instruction.
Watches answer clocks, matches credit notes on later invoices, drafts rebuttals and reminders, and hands agency causes to the agency debit memo team.
Turns twelve months of audited invoices into priced, cited negotiating asks for the renewal.
Approves, edits or rejects every dispute. The agents propose; a named person decides.
Ask about any invoice, segment, clause or credit — or tell the agents what to do. Every answer cites its source and opens the screen it came from.
Why did Kestrel bill us for passive segments?
Agencies entered 2,206 passive segments in September — GK or BK, recording tickets issued elsewhere, like K7QX2M from Lakeshore Travel. Kestrel billed each at $5.50. Schedule C-2 says passive segments are not billable: $12,133.00, in the dispute.
Why are 96 segments held for me?
They are cancel-and-rebook cycles from Corvane Vacations, office 4CVA — our own company. The pattern finder says churn under Schedule C-5; the second look says the contract counts any office, but disputing our own booking practice may cost goodwill before the renewal. $528.00 is at stake. You decide.
What do the GDSs still owe us?
$125,888.10 across 3 open disputes: Kestrel's accepted $40,118.25 for August lands on the October invoice; $21,362.00 is under rebuttal; Strata owes an answer on $33,005.70 for August, 5 days late, and on $31,402.15 for September, due Nov 12.
What should we ask for in the Kestrel renewal?
Five asks from twelve months of facts: passive segments never billed, no fee from the third churn cycle, the NDC rate by order reference, answers in 21 days, and Tier 3 from 7.0 million segments — an estimated $1,391,320 a year. Notice is due Tue Dec 1.
13 screens from the working solution, on its sample data. Pick one to see it large.
The limits and clocks every GDS invoice audit runs on are settings, and every change is logged. The administrator and the cost manager change them.
| Setting | Default | Choose from |
|---|---|---|
| Analyst dispute limit | $100,000 | $50,000 · $100,000 · $250,000; above it the Distribution Cost Manager signs |
| Put in the dispute automatically from | 95% confidence | 90% · 95% · 98%; below it a segment is held for a person |
| Second look on every catch | Always on | Locked on |
| Warn when a dispute window has less than | 15 days | 10 · 15 · 30 days |
| Remind a GDS that has not answered after | 30 days | 30 · 35 days |
| Send agency causes to debit memos without asking | Off | On · Off; when off, a person sends them from the caught segments |
| Billable rules per GDS | 8 rules on the Kestrel agreement, each mapped to a clause | Switched on after a replay on last month and the cost manager's approval |
Every figure is labelled: a target the solution is built to, an estimate, a typical published result, or a proven one.
“demo” = seen in the working solution, on its sample data · “target” = the design goal, measured in the live solution · “estimated” = our estimate ($60.6M a year of GDS billing × 2.1% caught × 92.5% credited, for a carrier of about 300 aircraft) · “typical” = published figures (AltexSoft on airline distribution costs — GDS fees of $3–$15 a segment, 2.5–3 segments a ticket; a GDS audit vendor's product page — billing discrepancies can add up to 2% to a GDS bill; DWU Consulting, 2026 — EDIFACT surcharges of $22–$30 a ticket). Corvane Airways, Kestrel GDS, Strata GDS, Lumen Travel Network, the agencies and the people named on this page are fictional — characters and sample data in the working solution.
A GDS invoice audit checks that every segment a GDS billed the airline was a real, billable booking at the contracted rate, and disputes what was not. GDS Invoice Audit does it for every segment, not a sample: eight agents tie the invoice to its segment file to the cent, check each billed segment against the airline's bookings and the agreement, argue the GDS's side, and draft the dispute for distribution finance to approve and sign.
A segment fee audit starts by tying each invoice to its segment billing file, matching billed segments to the airline's own booking history and applying the agreement's fee schedule and billable-segment rules. In GDS Invoice Audit the agents do this overnight in five layers — no Corvane booking, passive and churned, duplicates, cancellations and the airline's own changes, and the contract's rate — and each catch carries its clause and booking history.
Passive segment billing depends on your agreement. In the sample Kestrel agreement, Schedule C-2 says passive segments (status GK, BK or GL) are not billable, so the 2,206 passive segments on the September invoice — $12,133.00 — went into the dispute. The contract checker applies only the rules in your own agreements, each mapped to its clause.
The segment billing file a GDS sends with its invoice: one row per billed segment, with the booking locator, the agency office, the flight, the date, the status and the action. GDS Invoice Audit maps each GDS's file layout once, ties the file to the invoice to the cent before anything else, and stops the run if a GDS changes the layout. That makes the BIDT audit the first check on every invoice, not a spot check at the end.
The dispute drafter writes the letter clause by clause with an evidence file of every line; a person asks back, edits and approves it with a reason and an e-signature, inside the contract's dispute window. The credit tracker then watches the GDS's answer clock, handles GDS credit note matching — each accepted line to a credit note on a later invoice — and drafts a rebuttal when lines are rejected, citing the clause.
Yes. The contract checker prices each segment at the agreement's rate, so the gap between the NDC and EDIFACT booking fee is checked segment by segment. On the sample invoice it found 6,420 segments held as NDC orders but billed on the EDIFACT line at $5.50 instead of the amended $2.80 — $17,334.00, the largest paragraph of the dispute.
On the sample month, $64,754.80 of a $2,838,208.20 invoice was disputed — 2.28%. We estimate about $1.2 million a year for a carrier of about 300 aircraft with roughly $60.6 million a year of GDS billing, assuming about 2.1% caught and the 92.5% credit rate seen in the working solution. That is an estimate, not a result. The same audited months also feed GDS cost control at renewal: on the sample Kestrel agreement, five priced asks worth an estimated $1,391,320 a year.
Yes. The agents never send a dispute, post a credit or contact an agency or a GDS. A person approves, edits or rejects every dispute, rebuttal, payment hold, rule change and renewal position with a reason and an e-signature, and where the agents disagree, a person decides.
The Agentic Solution Engine builds and deploys it from your requirements and documents — your GDS agreements, fee schedules, segment file layouts and a past month of invoices — and it goes live once every quality gate has passed. Setup replays one month first, so you see what the agents would have caught against what you disputed.
Every memo carries its proof, and every dispute gets a cited reply.
1-min demoAgency Incentive ManagementEvery agency paid exactly what its contract earns, with each excluded sale explained.
1-min demoAirline Group Sales ManagementGroup quotes the same day, priced on the seats they displace, with every deadline watched.
1-min demoWe'll run GDS Invoice Audit on a past month of your own GDS invoices and segment files.