A money order is a way to send money to another person or business. I need to deposit a money order can I do this with PayPal?How long until it clears? Top 10 Best Money Order Near San Diego, California ; 1. Mail a check or money order to: San Diego County Credit Union Attn: Deposits, Payments or Payoffs P.O. Box 269040. San Diego, CA 92196-9040. Staff will complete a J53 form with the description of the item (i.e. , check number, denomination, and bank or company name where appropriate). For complete fee information, please read Money Matters on the University Bursar's Office website. Explore the best banking services with IBC across Oklahoma and Texas.