for the application of working pass, usually the company request you to fill up the form after signed the offer / confirmation letter or before that? Because last week I went Singapore to attend few interviews, and one of the employer seem like got interested to hire me and ask me to fill up the form for application of working pass. Is it in right procedure?

After the interview, the HR asked me to fill up the working pass form without giving me any offer letter. I told them I need time to discuss with my family and hope to get back the application form to stop them apply working pass for me. They told me won't do anything before get my confirmation thru email, but after one week I received an email from HR saying that my employment pass are successful applied and ask me to go for medical check.

*I'm so worry that I fall into scam company, as they are to aggressive in hiring.

If I reject the company's offer, would they cancel my employment pass as well? Will this affect my next application for employment pass with MOM in Singapore?