Please advise.

My brother & his wife are trying to purchase a new condo worth of 600k. However, their housing loan has not been approved yet. The banker has asked if he could get a guarantor to secure the loan because there is shortage of Rm600.

My question is if I agree to become guarantor, will there be any issues if I want to purchase house later on? I currently have a joint housing loan with my dad, the remaining loan balance is about Rm 60k. My dad has rented the unit so I'm not paying for that house. And also, if i become guarantor will my name listed in CCRIS report? Please guide me, thanks a lot.

P/S: sorry for my english