If it's a personal check, you have everything you need to take care of this problem.
Go to court, get your judgement. You can collect all your costs as well as the amount you sue for.
Don't bother with a lien on property if you want to minimize your costs, or alternately do place a lien to protect yourself.
The check has on it the bank transfer code and the account number of your fraudster. With a court order, you can place a Garnishing Order on the account. Time it correctly ... everyone has bills that occur at a specific time of the month, like the 1st for rent or mortgage. Place your Garnish order a day or two before that date.
The money will be out of their account and into yours before they know what happened. Also most elderly have Direct Deposit that can't be changed quickly, you will get your money.
This won't work if the account is no longer active, but that is fraud so you have other resources such as laying a charge or convincing a D/A to do so.
Where I am, a court order can be enforced by the Sheriff (different than a US Sheriff, which is more like a Police Officer; here the Sheriff enforces Court Judgements).
The Sheriff must notify the debtor but once a certain period elapses (30 days, typically), he can (and will) go to the debtor's property and confiscate goods like automobiles, furniture, actually anything of value. He has warrant power to enter the premises. They are then sold, no matter what revenue is, they keep going until the full debt is paid.
The debtor can make arrangements to pay if he or she is smart enough to respond during the 30 day (or whatever) settlement period, and avoid the above. Either way, you get paid.