# Membership guides

CreditUnions has 4 guides on federally insured credit unions, grouped by country.

## United States

- [Credit union rules in the United States](https://creditunions.fyi/guides/credit-union-rules-in-the-united-states.md): How the register describes US credit unions: federal and state charters, the field of membership, and the NCUA call report data behind each listing on this site.

## General

- [Common mistakes and questions about credit unions](https://creditunions.fyi/guides/common-mistakes-and-questions.md): People often assume they cannot join a credit union, skip the field-of-membership check, or confuse balance-sheet figures with rates and fees. Here is what to watch for.
- [How to choose a credit union](https://creditunions.fyi/guides/how-to-choose-a-credit-union.md): Check the field of membership first. If you cannot join, nothing else matters. Then compare charter type, assets and branch locations, and ask the credit union about fees and rates.
- [How to read a credit union listing](https://creditunions.fyi/guides/how-to-read-a-listing.md): Every listing on this site shows the charter number, field of membership, total assets and member count from the NCUA quarterly call report. Here is what each field means.

> **Not financial advice.** CreditUnions lists federally insured credit unions and the data they file with the NCUA. It is not financial advice and a listing is not a recommendation. Figures come from the most recent quarterly call report and were last checked on the date shown on each listing; they change, so confirm everything with the credit union before you join. To report a mistake, write to hello@creditunions.fyi.