In the US they do have to explain. It's a requirement of the Equal Credit Opportunity Act of 1974 [1]. Here is an article with more detail on what is required i

In the US they do have to explain. It's a requirement of the Equal Credit Opportunity Act of 1974 [1]. Here is an article with more detail on what is required in the explanation [2]. [1] https://en.wikipedia.org/wiki/Equal_Credit_Opportunity_Act#Requirements https://en.wikipedia.org/wiki/Equal_Credit_Opportunity_Act#R... [2] https://www.nolo.com/legal-encyclopedia/do-lenders-have-to-tell-you-why-you-are-denied-credit.html https://www.nolo.com/legal-encyclopedia/do-lenders-have-to-t...