This is part of the email msg I received from Seattle:
"YOU HAVE TWO OPTIONS FOR THE SUBMISSION OF YOUR PASSPORTS:
OPTION A: Bring your passports in person
Passports can be brought to our office: 1501 4th Avenue, Suite 600, Seattle, WA 98101
Passports may be brought in on Thursdays between the hours of 8:00 am and 11:00 am. Bring this message when you come in and take a number for General Enquiries. You will be called to a window to submit your passports. PLEASE BE ADVISED THAT SAME DAY SERVICE IS NOT AVAILABLE.
Your passports and visas will be ready to be picked up between 2:30 pm and 3:00 pm the FOLLOWING Thursday. If you do not come to the Consulate to pick up your passports, they will be returned to you by regular mail unless you arrange to have them returned to you using one of the premium services described below.
You must bring your passports in person. A representative may not submit passports on your behalf.
For security reasons, the Canadian Consulate General does not allow the entry of recording or transmitting devices into the immigration waiting room or interview areas. This includes all types of cameras, recorders, and cellular telephones.
OPTION B: Submit your passports by mail or courier
The security of your passports is important to us. We strongly encourage you to use United States Postal Service Express or Priority Mail (if in the USA) or Federal Express Courier Service (if in Canada). This allows you to track the delivery and return of your documents.
Our office is not liable for passports that are lost or stolen in the mail.
Send your original passports with a printout of this message.
RETURN OF YOUR PASSPORTS
We will return passports to addresses in the USA or Canada only. If your current mailing address is not in the USA or Canada, you must bring your passports to our office in person.
Once you have mailed your passports to us, they will be returned to you within 4 weeks from the date we receive them.
Passports sent to us by mail will be returned to you by United States Postal Service regular mail unless you use one of the premium services described below.
Passports sent to us by mail cannot be picked up in person.
ADDRESSES IN THE USA
If your address is in the USA, the Consulate will return your passports by U.S. Postal Service First Class Mail. Please provide a pre-paid, self-addressed return envelope with the correct postage affixed. We will not use registered mail, certified mail or return postage coupons.
If First Class Mail is not acceptable, please provide a pre-paid, self-addressed United States Postal Service Express or Priority Mail envelope with the correct postage affixed. Enter a daytime telephone number on the mailing label above the recipient address. Make a note of the tracking number.
Please note: We will not return passports to US addresses using ANY commercial courier service.
ADDRESSES IN CANADA
If your address is in Canada, the Consulate will return your passports via United States Postal Service First Class Mail. Please enclose a self-addressed return envelope. We will not use registered mail, certified mail, postage coupons and Canadian Xpresspost envelope.
If First Class Mail is not acceptable, please provide a completed Federal Express air waybill and a return Federal Express courier envelope. You must fill in your name and address as both the sender and the recipient on the waybill. The Consulate's address must not appear on the waybill. You must enter your valid Federal Express account number in the appropriate billing information box. Charges must be billed to recipient, not to sender. Payments by cheque or credit card are not accepted. Make a note of the tracking number.
The Consulate will not be responsible for filling out courier labels or verifying shipping charges; these are the sole responsibility of the applicant.
Please note: We will not return passports to Canadian addresses using any commercial courier service other than Federal Express."