What should IT staff know/get from (outsource) software vendor?

Question

Before contract with software vendor expires, we need to secure existing applications they developed and be ready to anticipate problems without any help and support from the software vendor.

besides the source code, what should I know/ask/get from software vendor?

(Just in case you want to know why we decide to stop the contract, because we don't trust them anymore. so, threat to application from the software vendor is also our consideration :)

Answer 1

Having a code review with them is always useful - knowing why and how they did the things they did is vital to future maintenance.

Documentation, obviously, and test cases are always useful, otherwise you'll end up having to implement your own. If they can't provide either, you should be worried :-)