The HDB officer bears the responsibility of verifying the signature. At this late stage,if the sellers cannot complete, you can ask the court to order specific performance that they be compelled to complete the sale to you.
You could contact me if you need to speak to me.
.
欢迎来到华新中文网,踊跃发帖是支持我们的最好方法!
Circumnavigator, lawyer and columnist and the man who divides his time between Singapore, Hong Kong and China. I believes that etiquette transcends nationality and race. 
In this column I will offer stylish advice to everyday questions on etiquette at work and at home and anything else that may be bothering you.