Each program's own after-death page: the documents it asks for, how the request is submitted, how long it takes, and what its terms do with the account and anything of value in it.
183 programs

AgileBits' terms forfeit a 1Password account at death

Adobe reviews requests about Adobe Stock royalties after a death case by case

Adobe reviews requests about an Adobe account after a death case by case

Aeroplan points can pass to the estate after a death

Airbnb reviews requests about an Airbnb account after a death case by case

Formagrid reviews requests about an Airtable account after a death case by case

Atmos Rewards points can pass to a family member after a death

Albertsons' terms forfeit Albertsons points at death

Amazon.com Services reviews requests about Amazon Flex earnings after a death case by case

Amazon.com Services reviews requests about Amazon Seller balance after a death case by case

Amazon.com reviews requests about an Amazon account after a death case by case

American Airlines reviews requests about AAdvantage miles after a death case by case

American Express reviews requests about Amex Rewards points after a death case by case

Amtrak's terms forfeit Amtrak Guest Rewards points at death

Apple's terms forfeit Apple Books e-books at death

Apple's terms forfeit an Apple Music account at death

Apple's terms forfeit an Apple TV account at death

An Apple account can pass to a family member after a death

An AT&T account can pass to a family member after a death

Audible's terms forfeit an Audible account at death