Here is some information about uncollected goods in QLD
I would suggest you take the matter to QCAT and get an order to be able to dispose of the goods this will give you 100% protection.
You should notify him of the plan to dispose of the boat.
if the number you have is a mobile number then you can text him and keep a copy of the text to show as evidence.
These are you best options.
I hope this makes sense and is of assistance. If there is nothing further
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