妹妹做新樓按想我做擔保有否責任呢!!

Of course YES!

I did it the same way as you 8 years ago. That time I think no (low)
risk and help other....Now, they cannot pay the mortage. The bank sold the
flat but the differences + lots of fee is asking me to pay!!!

人心難測。你信得過你個妹，但你妹夫信唔信得過呢？萬一她們兩夫妻感情出現變化，你個妹供唔供得掂？

風險就係佢斷供搵佢唔到就會搵你還錢. 如你有資產最壞就係銀行申請你破產還債, 唔駛死.

但妹妹咁親, 佢無必要害你掛

簽擔保, 若借款人欠供而欠款 , 擔保人當然會因而負擔責任啦. 因為對於銀行來說, 你是其中一個'擔保'銀行有錢收的人, 所以做擔保人一定要考慮清楚.

詳細情形可向銀行查詢.
不過,凡是做擔保人就要預負上一定責任及風險,
所以,真是要諗清楚呀!