0088·Invoice number format is not accepted
Invoice headerOccasional
What this means
Where an invoice reference is supplied, FBR constrains its characters. Letters, digits, and hyphens are permitted, and a hyphen must sit between alphanumeric characters rather than leading, trailing, or doubling.
Why it happens
- Slashes were used as separators, which is common in Pakistani invoice numbering.
- The number ends with a hyphen because a suffix component was empty.
- Spaces or other punctuation appear in a prefix.
- A branch code containing a slash or hash was concatenated into the number.
How to fix it
- 1Use hyphens rather than slashes as separators throughout your numbering scheme.
- 2Ensure every hyphen has an alphanumeric character on both sides.
- 3Validate the pattern when generating the number, not when submitting it — by then it is already on the printed document.
How Ordyoo handles this
Invoice numbers are generated from a hyphen-separated prefix, year, and sequence, which conforms by construction. Sequence numbers are derived from the highest existing suffix rather than a count, so gaps do not permanently desynchronise the series.
Related errors
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