Consumer Protection Act -Possession offered without the requisite completion certificate is illegal, and a purchaser cannot be compelled to take possession in such circumstances – Referred to Debashis Sinha v. R.N.R. Enterprise (2023) 3 SCC 195 – the absence of these certificates would constitute a deficiency in service. [In this case, the court held that ADA’s failure to provide the required certificates justifies the appellant’s refusal to take possession. This strengthens the appellant’s claim for additional compensation to compensate for the delay caused by ADA’s breach of its statutory obligations]