On the surplus claim form you put owners name but then for mailing address you put
C/O Your Biz Name
Your Biz mailing address
There are banks that accept 3rd party checks, especially since its a check from a government entity (the county).
The following banks and credit unions are among those that currently accept third-party checks. However, before simply opening an account with a bank, tell them specifically what may happen and ask if they allow it. Tell them a county will send a check to you, but made payable to your client. Your client will endorse the check to you for deposit into your bank account.
- Navy Federal Credit Union (only when deposited to a business account)
- Bank of America
- Chase Bank
- HSBC Bank
- US Bank
- Chartway Federal Credit Union
- Connexus Credit Union
- First National Bank
Now, instead of a Contingency Agreement + Power of Attorney Form, if you have the property owner sign an Assignment of Interest Form, then the county will put your name on the check because you are now the owner of the surplus funds.
Each county has their own Surplus Claim Form so the wording will be different, but for an example, here is a clip from Broward County Claim Form and how you fill it out.