The use of checks is usually in the assumption that money is in your account however, if you do not have money and you need to pay something that is large, you can still use these checks only this time, you should change the date. This method is called the post dated check usage.
What it does is to give oyu ample time to make sure taht you put money in your bank. It does not take a genius to realize how these things work. For example, if somebody asks for a payment of an item that oyu bought, you can always have the check dated at a future day not far from the current one. This works really well because if the person who hands the check to the bank, they will not cash it or consider it bounced if ever the date is not correct.
The only problem is that not many people allow the use of post dated checks. They see these checks are risks and they simply do not want to have problems with receiving payment. What you should do is to give these people the assurance that they need and they too will give you their trust in return.