These are the settings that relate to the document type field.

Distance

A document is searched for terms that indicate if it is a credit memo. The distance indicates the fuzziness of a search. The value specified is between 0 and 1, where 0 requires an exact match, and 1 accepts values that do not match at all.

This is set to "0.17" by default.

Stop All Credits

If selected, all documents identified as a credit memo are sent to Validation for manual review.

This option is cleared by default.

Ignore Negative Total

If selected, negative invoice amounts are not used to determine if a document is a credit memo.

This option is cleared by default.