Under the FIDIC Red Book (edition 1999): the Contractor submitted Final Statement in accordance with...

According to the FIDIC Red Book 1999,Sub-Clause 14.10 – Application for Final Payment Certificateand related procedures allow the Contractor to submit the Final Statement, which includes the final account of all sums due.

If after submission the Contractor identifies errors or omissions in the Final Statement, the Contractor is generally entitled tosubmit corrections or adjustmentsto that statement before the issuance of the Final Payment Certificate. This ensures that the final account accurately reflects all amounts due.

The Engineer reviews the Final Statement and may seek clarifications or adjustments. The contract typically allows the Contractor to correct or revise the Final Statement as part of this review process.

However, once the Final Payment Certificate is issued and accepted by the parties, it becomes more difficult for the Contractor to amend the Final Statement without formal agreement or dispute resolution.

Hence, prior to certification, the Contractor can correct the Final Statement.