Contact us with any questions

Step Three:

Once you have the forms filled out and notarized, please mail the original forms to:

Dockside Solutions

7001 Seaview Ave. NW, Suite 160

Seattle, WA  98117

To get your mailbox set-up more quickly, you may:

  • Scan and email them to
  • Fax them to 206.588.1918

We will still need the original forms sent to us.

Step Four:

​Payment - you may send a check (payable to Dockside Solutions), call us with a credit card, or use the online payment tools below.

Please choose your type of mailbox and term:

If you have any questions, please contact us via the form below, call us at 206.434.8241, or email us directly at

We look forward to assisting you!

Sign Up for Physical Shilshole Bay Marina Mailbox


If you sign up for 1 year, you will receive 1 additional month free

Step Two:

Print these forms. The USPS 1583 form must be notarized and 2 forms of identification must be copied.   For examples of acceptable forms of identification click here.  You may also print the Notary All-Purpose Acknowledgement to give to the notary to fill out:

during business hours

If you have any questions, please contact us and we can help.

Thank you for choosing Dockside Solutions.  The easiest way to sign up for a mailbox is to bring your 2 forms of ID and come see our friendly staff at Dockside Solutions located at Shilshole Bay Marina in Seattle.  However, if you are unable to do that these are the steps to sign up online:

Step One:

Click and fill out these 2 forms:

located throught the marina