Reference / Quality Indicators

Tax Code Quality Indicators

Reference codes returned for tax-code calculation, extraction, checking, and matching in Egon Tax Code services.

• Copy this page
  • View as Markdown
• Ask an AI assistant
  • Open in ChatGPT
  • Open in Claude
  • Open in Cursor

Quality Codes

Detailed quality indicators describing checksum calculations, birth coherence, omocody substitution, and national identifier consistency.

Flag	Code	Description
0 · OK	0	OK
1 · Changed	901	Date of birth not present
1 · Changed	902	Gender not present
1 · Changed	903	Different tax code due to omocodia (digits replaced by letters)
1 · Changed	904	Ambiguous characters
1 · Changed	905	Uppercase characters
1 · Changed	906	Double name
1 · Changed	907	Double surname
1 · Changed	908	Inverted name and surname
1 · Changed	909	Inverted VAT number and tax code
1 · Changed	998	Logic error
1 · Changed	999	Not processed
2/3 · Not valid	401	Code not present
2/3 · Not valid	402	Wrong format
2/3 · Not valid	403	Wrong code
2/3 · Not valid	404	Not numerical
2/3 · Not valid	405	Code too long
2/3 · Not valid	406	Wrong date of birth
2/3 · Not valid	407	Incongruent date of birth
2/3 · Not valid	408	Incongruent gender
2/3 · Not valid	409	Wrong tax office code
2/3 · Not valid	410	Incongruent tax office code
2/3 · Not valid	411	Incongruent National Identifier
2/3 · Not valid	412	Incongruent VAT number
2/3 · Not valid	413	Surname not present
2/3 · Not valid	414	Name not present
2/3 · Not valid	415	Date of birth not present
2/3 · Not valid	416	Gender not present
2/3 · Not valid	417	Place of birth not present
2/3 · Not valid	418	Wrong check-digit
2/3 · Not valid	419	Wrong surname
2/3 · Not valid	420	Wrong name
2/3 · Not valid	421	Wrong place of birth
2/3 · Not valid	422	Inconsistent surname
2/3 · Not valid	423	Inconsistent name
2/3 · Not valid	424	Wrong month of birth
2/3 · Not valid	425	Wrong day of birth
2/3 · Not valid	426	Wrong gender
2/3 · Not valid	427	Place of birth not found
2/3 · Not valid	428	Invalid data
2/3 · Not valid	429	Year of birth not numerical
2/3 · Not valid	430	Month of birth not numerical
2/3 · Not valid	431	Day of birth not numerical
2/3 · Not valid	432	Ambiguous place of birth
2/3 · Not valid	433	Incongruent place of birth
2/3 · Not valid	434	Double name
2/3 · Not valid	435	Double surname
2/3 · Not valid	436	Cadastral code not found
2/3 · Not valid	437	Province code not found
2/3 · Not valid	438	Wrong VAT number
2/3 · Not valid	439	Not numerical VAT number
2/3 · Not valid	440	VAT number not present
2/3 · Not valid	441	Mandatory data not present
2/3 · Not valid	444	Tax code not present
2/3 · Not valid	445	Economy activity code not found
2/3 · Not valid	446	Old economy activity code not found
2/3 · Not valid	447	VAT number in the tax code field
2/3 · Not valid	448	Tax code in the VAT number field
2/3 · Not valid	449	Wrong tax office code