An advocate is not an attorney so you need to serve the response to her 5 court days before the hearing if this is in Snohomish county-- if you mail the docs it has to be mailed 8 court days before the hearing. Worse comes to worse, ask for a continuance if she will not give you a physical address to which you can deliver the docs. However, if the PO box is in one of those UPS places, you could physically deliver the response to the PO Box 5 court days before the hearing. It is improper for her to send the original docs to your Crim attorney if he has not filed a Notice of Appearance in the case civil case.
Please note that THESE COMMENTS ARE NOT INTENDED AS LEGAL ADVICE and are for informational purposes only. This response is not intended to create any attorney-client relationship and is only based on the limited facts given. The response might change should additional facts be learned and should not be relied on as legal advice. It is recommended that you consult with an attorney who can properly assess the situation, as well as all pertinent facts, prior to taking any action based on the foregoing statements