If I have a security interest in a boat slip/boat slip right, how do I protect myself?

ALA cannot prevent a transfer if the owner requests it to be done. However, we will notify both buyer and seller if we have a written request to do so. Mail a letter to the ALA office stating that you have security interest and give the pertinent details - boat slip number and current owner's name. We will place that in the file and will notify you (the secured party) if a transfer is requested.