Please withhold your scornful remarks and dismiss such custom as superstitious and hear my side of the stories first:
The first story came from a relative, Ann.
A few years ago, Ann's relative ordered a paper house to be burnt to her late father.
The paper house was first blessed by a Taoist and after some rounds of chanting, it was brought to the front of the old man's grave and burnt.
On that night, Ann's relative dreamed her pa came to her complaining that new house she gave to him were having 'roof leak'.
During breakfast next morning, this relative related her dream to her big brother and surprisingly; he too had the same dream...
Both of the brother and sister decided to return to their old man's grave to investigate. To the astonishment of both of them, they found a corner of the paper house roof wasn't burnt completely perhaps due to wetness.
After some discussions, Ann's relatives decided to buy another house for their beloved pa. This time, they made sure that everything was burnt before leaving.
This time, their old man didn't give them any dreams. Perhaps the deceased can finally RIP.
The second story was told to me by a friend, Eric.
When Eric's mom passed away, he ordered a large paper mansion for her.
During the dead ceremony, while the Taoist was chanting; Eric's 5 year old son was playing with his cousins. Accidentally, the child rammed into the paper mansion placed beside the main altar and broke a corner of the mansion.
Everyone thought it was okay and the mansion was subsequently burnt under the supervision of the taoit-in-charge.
On the same night, Eric dreamed of his late mom came to him and asked: "Why did you give me a broken house? It is now leaking!"
The dream made Eric awoke in the middle of the night and he couldn't sleep further. He waited until morning and told the story to his siblings.
They decided to make another bigger mansion for their mom. None of them received any complaints ever since.
Do you believe in ghosts?