How to organize joint up-to-date access to the site and hosting between the contractor and the customer?

Question

Work organization

Situation: You are a freelancer or a web studio. You always have logins and passwords from registrars and hosting clients. How do you ensure they are up-to-date and/or accessible to the client?
Share links or your best practices right here, how do you organize work with a customer who in the future may have to unilaterally take away access to sites, registrars and hosting? (about payment and fulfillment of contracts - this is another thing, here it’s about not constantly pulling you, if you need to eventually transfer things to a full-time SEO or enikey manager)

Answer 1

at home: the last backup of the area of ​​responsibility, confirmed and deployed
at the customer's: control over changing passwords for accounts