Key takeaways
- Separate correction of a rate or formula from expansion of the claim.
- Preserve the earlier submission and the documents actually supplied with it.
- Identify any period or component added by the revision.
- Review settlement scope before assuming a further demand remains open.
- Reconcile the revised amount and obtain advice on its legal status.
Classify the revision before changing the invoice
Steamship Mutual's Abqaiq appeal discussion illustrates how revised demurrage claims can raise questions about claim identity and settlement scope. The reported outcome does not authorise every later amendment. Check the current text, correspondence and applicable law with an adviser before deciding whether a proposed revision is effective or timely.
Start by describing what changed. A wrong daily-rate input is different from an omitted port period. A corrected arithmetic formula differs from a new interpretation of the charter. A change of label may or may not leave the underlying claim the same; that requires appropriate analysis.
The commercial reviewer should identify the reason and supporting source for every material revision. A new invoice should not be used to obscure why the claimant is asking for a different sum. The recipient needs to understand the actual change before responding to it.
If several changes occur together, separate them in the reconciliation. Otherwise, an accepted correction can become entangled with a disputed expansion of scope.
Establish the original claim's boundaries
Retrieve the original claim communication, calculation and supporting documents as supplied. An internal folder may contain material that was never included in the submission. The revision review needs the actual communication history, not an assumption that everything on file reached the counterparty.
Identify the periods, ports and components originally advanced. Preserve qualifications and reservations. The reviewer should be able to compare the proposed revision with a stable description of the earlier demand.
Do not determine those boundaries from the invoice title alone. The calculation and correspondence may explain the claim in greater detail. Conversely, a broad title may not establish that every conceivable component was included. The adviser needs the substantive record.
The same discipline applies to supporting evidence. A later document may clarify an existing component or relate to a newly proposed one. State which role it performs rather than adding it to a larger attachment pack without explanation.
Worked fictional rate correction
This ILLUSTRATIVE example assumes 18 chargeable hours under an agreed pro rata daily-rate method. The original calculation used USD 24,000 per day, but the revision assumes that the agreed rate should have been USD 26,000 per day. Duration and scope remain unchanged solely for this example.
| Item | Calculation | Amount |
|---|---|---|
| Original demand | 18 ÷ 24 × USD 24,000 | USD 18,000 |
| Revised demand | 18 ÷ 24 × USD 26,000 | USD 19,500 |
| Increase | USD 19,500 − USD 18,000 | USD 1,500 |
The numerical difference comes entirely from the rate input. No new period is added. The example excludes interest, taxes, fees, deductions and currency conversion, and makes no finding about entitlement, time bars or settlement.
In an actual claim, the reviewer would need to verify the agreed rate and the method for applying it. The numerical reconciliation explains the change; it does not establish that the revised demand can be pursued under the contract.
Review a scope change differently
Adding a period or port component requires more than replacing a total. Identify the new factual basis, the proposed contractual treatment and the supporting material. Ask the adviser how the applicable presentation requirements affect the change.
Do not assume that an earlier demurrage submission protects every later demand associated with the voyage. Equally, do not assume that every corrected amount is necessarily a new claim. The actual substance, wording and communications need review.
The commercial team should prepare a clear comparison: original component, revised component, reason and evidence. This lets the adviser focus on the meaningful difference rather than reconstructing it from spreadsheets with altered row structures.
If the revision is a proposed alternative position rather than a correction accepted by both parties, label it accordingly. The principal should understand whether the team is fixing an error, responding to new evidence or advancing a disputed interpretation.
Check settlement and payment history
| Prior event | Question before revision | Record needed |
|---|---|---|
| Negotiated reduction | What issue and scope did the parties resolve? | Relevant offer and acceptance communications |
| Partial payment | How was the payment described or allocated? | Payment advice and account correspondence |
| Agreed invoice | Which demand did the agreement address? | Agreed calculation and supporting exchange |
| Reserved component | What was expressly left open? | Actual reservation and response |
| Informal discussion | Was any commitment made by an authorised person? | Complete communication context |
The invoice ledger alone may not explain settlement scope. A payment could relate to an agreed component, an interim arrangement or a wider resolution. Obtain the actual evidence and advice rather than deciding its effect from a status field.
The revision should not describe a previously settled matter as open without review. Nor should the team assume that payment of one component settled everything. The commercial principal needs a precise account of what is established and what remains uncertain.
Release the revision as a coherent claim package
The revised communication should identify the changed amount or scope, the supporting reason and its relationship to the earlier demand. The invoice, calculation and cover explanation should use the same adopted position.
Check that the supporting documents correspond to the revised components. A corrected calculation may rely on an event not explained in the old narrative. An added component may require a different evidence set. The package should allow the recipient to assess the actual claim now advanced.
Keep the submission history intact. Preserve the new communication, attachments and available transmission evidence as a separate event. Do not replace the original record with the revised package and lose the ability to show what was previously submitted.
Finally, update the internal account status accurately. A revised claim is not automatically an accepted receivable. The principal should see the amount advanced, the counterparty's response and any unresolved legal or factual issue before deciding the next commercial step.
Common mistakes
The main mistake is calling every change a clerical correction. An added period or different contractual basis deserves distinct review. Another is relying on an invoice title to define the original claim or settlement.
Do not assume that a prior submission or payment settles the status of the revision. Review the actual communications. Avoid sending a corrected invoice with an obsolete calculation or cover note. The revised package should explain one coherent position while preserving the earlier history.
Where Zeaclub fits
Zeaclub offers digitalised procedures across the voyage workflow.
Zeaclub provides 24/7 operating systems and worldwide coverage.
Explore Zeaclub
Educational information only; not legal, financial or trading advice. Contract wording and applicable rules control. Verify current requirements and obtain qualified advice before acting.
Frequently asked questions
Is changing the claimed amount always a new claim?
Not necessarily, but the answer requires analysis of the actual change and applicable terms. Identify whether the revision alters arithmetic, inputs, scope or substantive basis, and obtain appropriate advice on its effect.
Can a claim be revised after a contractual deadline?
Do not assume either permission or prohibition from a general rule. The wording, original submission and nature of the revision matter. Seek advice promptly and preserve the complete submission history.
Does partial payment mean the rest remains open?
Its effect depends on the actual arrangement and communications. Establish how the payment was described and what was agreed. A ledger entry alone may not resolve the scope of any settlement.
What should accompany a revised invoice?
Provide a concise reconciliation, the revised calculation and relevant supporting evidence, together with a clear explanation of the relationship to the earlier demand. Preserve any unresolved qualifications and obtain the required authority before issue.