Difference between confirmation and confirmability

[Guest]

Test No. errors/advan-2 "Please, remind me", question 2

A vehicle cannot be released until we have received confirmability from the finance company.

(a) vehicle
(b) released
(c) have
(d) confirmability

Test No. errors/advan-2 "Please, remind me", answer 2

A vehicle cannot be released until we have received confirmation from the finance company.

Correct entry: confirmation
The error was: (d) confirmability
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what's the anwer?and why?

[Alan]

Here you need confirmation.
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