There are different options for managing Chapter/SIG funds:
Treasurer: Every Board should have a Treasurer. This individual is generally responsible for managing chapter funds and tax-related activities. Treasurers may work in concert with other Board members or committee members to manage these responsibilities.
SIGs and unincorporated Chapters likely can't have bank accounts or tax ID numbers so any funds must be held by a private individual on behalf of the group. For this reason accounting, tracking, and double checking is important for transparency and security of funds.
Volunteer Accountant: Even with a Treasurer in place, it can be worthwhile to reach out to membership and ask for volunteer accounting help.
Paid Accountant: Should accounting responsibilities become overwhelming for the Treasurer, it may make sense to hire an accountant for advice or assistance in managing funds and/or taxes.
Do we need an accountant or attorney?
There is not absolute need for either and attorney or an accountant. Getting an tax ID number/EIN, setting up a bank account, and incorporating can all be done by with professional assistance. That said, organizing and managing Chapter/Sig finances can seem a daunting task, and some may feel more comfortable getting professional advice and/or support.