An FMP lawyer may go to court to defend you if this happens. FMEP enforces payment of court orders. You are not eligible for BC Benefits. Assignment is required under BC Benefits legislation, and is not open to appeal. The government will still get a court order.
Informal arrangements are often unstable and leave the custodial parent open to intimidation.
Government arrears can accumulate once the assignment has been signed. If the government is owed arrears, then the assignment stays in place until all the arrears are paid. You will receive your arrears first, then the government will receive theirs. The assignment continues after you no longer require BC Benefits. These are federal and provincial initiatives that set new maintenance levels according to the income of the payor.