Neeraj,
We were told the same thing by the developers, our lawyers and our agent, so I guess it must be so.
We have been in touch with Roy Howitt of InspectaHomeSpain who in turn put us in touch with PSI ( www.propertysi.com)
We haven't used them yet as like you, we are awaiting completion on a Block 5 apartment, but they seem pretty switched on. The only thing we are querying with them is whether they follow-up the initial snagging to ensure that the work is done.
I take it that, like us, you are marooned in the UK and are having to do everything remotely?