After filing the divorce petition, you must serve your spouse with copies of the petition and the summons. (info.legalzoom.com)
You must also provide a stamped copy of the petition to the other parent. (info.legalzoom.com)
In addition to setting out your financial situation, the affidavit for fee waiver also needs to attach a draft copy of your petition so the court can see what the case is about. (judicialreviewbc.ca)