1. There has to be a adequately stamped written agreement signed by both parties, in which you can mention the sale of goods to him for Rs. 35000/- and you have obtained Cheque No...... drawn on.......Bank on........date.....for the amount from the buyer, towards sale consideration for the goods you are selling to him.
2. Above procedure is required to be done followed in case the Cheque bounces and if so, you can file a case against him U/s. 138 of N.I. Act to recover your money.