1. Purchase the down payment invoice. For buyers who borrow money to buy a house, they can get the down payment invoice after paying the down payment.

2. Full invoice for house purchase. Exchange the down payment invoice or receipt for the full purchase invoice. Moreover, the full purchase invoice is very important, and it must be used when handling the real estate license.

3. Purchase contract. What we're talking about here is signing a contract online. After we pay the down payment, the sales staff will take us to the bank to sign the loan in person, and at the same time start online signing for the record. When the online contract comes out, we will go to the bank to apply for a house.

4. Loan contract. When your loan is successful, it means that you have established a cooperative relationship with the bank. Of course, you should also have a loan contract in your hand, detailing your loan amount, repayment method and repayment period, and also stipulating the liability for breach of contract for early repayment. If you have the idea of prepayment, you must get this contract to prevent disputes.

5. Deed tax invoice. Deed tax invoice must be used to handle real estate license, and deed tax invoice is also the basis for calculating whether the house is over 2 years and 5 years.

6, maintenance fund invoice. Maintenance fund invoices are usually of little use, mainly when the house changes hands. This invoice can be used as evidence that you have paid the maintenance fund.

Invoice refers to the business vouchers issued and collected by all units and individuals in buying and selling goods, providing or receiving services and engaging in other business activities. It is the original basis of accounting, and it is also an important basis for law enforcement inspection by audit institutions and tax authorities. Receipt is the proof of receipt and payment, and invoice can only prove that the business has happened, but can't prove whether the money has been received or paid.