The presence of both parties (my ID card), the letter of introduction from the development company, and the application form for termination of the contract.

2. Original sales (pre-sale) contract

3. Agreement

4. Payment voucher (original and copy)?

5. Bank refund voucher (such as copy of cash check, copy of bank statement and copy of bank transfer check)

And bank statements)

6. Write a statement and have relevant procedures.