# Keep an evidence file and report errors

Lesson 4 of [Research credit union records in depth](https://creditunions.fyi/academy/research-credit-union-records.md), 17 minutes.

The evidence file For each credit union you check, keep: - the name, the NCUA charter number and the charter type - the field of membership on record - the cycle in the source note and the date you read the listing - the date you checked the NCUA record, and what it showed - each question you asked,…

The rest of this lesson is for learners enrolled in the course. [See how Research credit union records in depth works](https://creditunions.fyi/academy/research-credit-union-records.md).

Also on the [web page](https://creditunions.fyi/academy/research-credit-union-records/keep-an-evidence-file).