Urbackup postfilebackup and integration with healthchecks

Hello,
i would integrate urbackup with healthchecks (https://healthchecks.io/ )
i have a self-hosted healthchecks app.

so i would send a curl on backup is finished successfull,
in according to manual
https://www.urbackup.org/administration_manual.html#x1-330006.4
postfilebackup is executed ONLY when backup is successfull correct?

i read on manual
Called if a file backup successfully finished
but i prefer ask to confirm.

if yes, this behavior work ONLY when backup is successfull is same on linux client and windows client?

thank you in advance