Select to expand quote
Chris6791 said..Just tell them your mother has dementia and they have significant sentimental value and you want them back.
Let us know how you get on.
This one works well over here^^^
Similar should apply in Victoria, the quicker you contact the Police station [and officer] involved your chances are better to recover the firearms.
Stress to them that your Mum in law had no idea the firearms could have been licensed or sold - if she had known there is an option of legally selling or keeping the firearms she would have taken it.
Contact your state branch of Sporting Shooters Association of Australia - they will be able to help with "Victoria specific" advice much better than we can from our side of the borders.
SSAA might want you to become a member - this is around $90 a year, but is well worth the money in your case.
They may also help with valuation and sale of the firearms too - or if one of your family want to keep the heirlooms, assist with your license conditions.
stephen