1. One can understand your apprehension of some thing going wrong after the execution of Agreement of Sale and hence your question.
2. Normally buyers who go for home loan follow this method of paying only 10% advance from their own resources to the seller and later on approach the lender for the remaining 90% by producing the Agreement of Sale.
3. If the Demand Draft is genuine, it is as good as cash and can be relied upon and also get it verified by the Bank.
4. You have to be provided with a draft copy of the Sale Deed for you to get it verified by an Advocate and also to mention the DD No. in the sale deed.
5. It is but natural that if the DD is not cleared by the Bank, the whole transaction becomes Null & Void.
6. Even if the DD gets damaged, by approaching the bank, a fresh one shall be issued instead of the damaged one.