Sorry for the delay in responding to your question.
The answer is that it depends on what your state law provides. The law on payment on death & totten trust accounts is usually found in each state's version of the Uniform Mulitple-Party Accounts Law.
This Uniform Law will provide a definition on what is a "POD Payee" and a "Beneficiary" (totten trust beneficiary).
If those definitions are restricted to "individual" or "natural person", then any non-individual entity (including a church) would not qualify.
If those definitions use the term "person" (as does California law) then you need to look up the statutory definition for "person". In California, the California Probate Code defines "person" as:
"an individual, corporation, government or governmental subdivision or agency, business trust, estate, trust,
partnership, limited liability company, association, or other entity."
So in California, a church can be a POD payee. Again, check your state law or consult with your attorney to see if Florida law is similar or not.