When buying a house before marriage and making a down payment, bank statement notes are very important. Generally speaking, you can indicate "house purchase payment for house No. xx, unit x, building x, xx community" in the transfer message or the source of the money in the remittance order, so that the purpose and flow of the money can be clearly stated.

In addition, if you transfer the purchase money to the other party, be sure to clearly indicate in the remarks the purpose of the money, the specific address of the house purchased, and whether the payment is for down payment or full payment. This will help ensure your rights and avoid possible disputes.

Please note that the specific remark methods and terms may differ from bank to bank and region to region. You can consult relevant bank staff or legal professionals for more accurate and detailed information.