courtesy call

US /ˈkɜːr.tə.si ˌkɑːl/
UK /ˈkɜːr.tə.si ˌkɑːl/
"courtesy call" picture
1.

a visit or telephone call made as a matter of politeness or goodwill, rather than for a specific purpose

:
The new ambassador paid a courtesy call on the president.
I just wanted to make a quick courtesy call to see how you're doing.