As long as you have money in your trust account, it acts as a collateral for your shares. When T+3 comes, your broker will most likely call you and ask if you want to pick up your shares meaning paying for it. If you don't want to pick it up, they will ask you if you want to sell it at what price and they will queue it for you.

If they can't contact you they'll use the money in your trust account to pay for the shares.

On a sidenote, I really believe and encourage newbies in stock market to go for dealer/remisier services by calling them and talking to them instead of using the online system. Your broker is the best person to tell you and advise you what to do. Until you know all the tips and tricks of the stock market and when you are confident of your decisions, then go for online broking.

Seriously paying extra for these kind of service really keeps your mind at ease. You can even tell your dealer to monitor certain stocks for you, and they will call you whenever it reaches near your range. I don't even trade often and my dealer will call me often enough to update me whats going on in the market, how my shares are doing, how my target shares are doing and throw in some tips and rumours as well.

Your remisier/dealer can be your teacher as well as a servant.

You can have many trust account but 1 CDS account.

Normally if you are not a nominee account, the CDS address will be your home address or whatever you put in the application form. So the dividends will be sent by the company to that address based on the information in the CDS.

If you are a nominee account, the bank will get the dividends first, then they will sent another check to you. As far as I know.