# 22 Creditor Reference (SCOR) ## Validate a creditor reference number - [POST /v2/creditor-reference/validate](https://apis.codeblock.ch/qr-invoice/api-docs/22-creditor-reference-(scor)/validate_3.md) ## Normalize a Creditor Reference - [POST /v2/creditor-reference/normalize](https://apis.codeblock.ch/qr-invoice/api-docs/22-creditor-reference-(scor)/normalize_2.md) ## Calculate Check Digits using Modulo 97 if the given input would be added to creditor reference RF[checkdigits][input] - [POST /v2/creditor-reference/modulo97](https://apis.codeblock.ch/qr-invoice/api-docs/22-creditor-reference-(scor)/modulo97.md) ## Format a Creditor Reference - [POST /v2/creditor-reference/format](https://apis.codeblock.ch/qr-invoice/api-docs/22-creditor-reference-(scor)/format_2.md) ## Extract the actual reference number from a Creditor Reference - [POST /v2/creditor-reference/extract](https://apis.codeblock.ch/qr-invoice/api-docs/22-creditor-reference-(scor)/extract_1.md) ## Create a creditor reference. If the passed creditor reference is missing prefix and checksum, it is calculated and appended. - [POST /v2/creditor-reference/create](https://apis.codeblock.ch/qr-invoice/api-docs/22-creditor-reference-(scor)/create_3.md)