Such evidence would be admissible for the purpose of showing that each check involved in the present case was made and delivered "wilfully, with intent to defraud." (See People v. Cuthbertson, 176 Cal.App.2d 393, 395 [ 1 Cal.Rptr. 435]; People v. Reseigh, 200 Cal.App.2d 301, 303 [ 19 Cal.Rptr. 199]; People v. Dick, 200 Cal.App.2d 424, 431 [ 19 Cal.Rptr. 317].) [7] Complaint is made of the reference by the deputy district attorney in his argument to the jury to the defendant's testimony that his parole officer told him that he could not have a checking account.