Agree the rules first
Write down the contribution amount, the due date, the rotation order and what happens when someone is late. A simple document prevents most arguments.
Open a group wallet
A treasury wallet keeps group money separate from personal accounts and gives every member a view of the balance.
Track every contribution
Digital contributions create an automatic record per member and per round, so nobody has to remember who paid.
Require approval on withdrawals
Set payouts and withdrawals to need approval from more than one officer. It protects both the group and the treasurer.
Report regularly
Share a short monthly summary: contributions received, payouts made and the balance. Transparency builds the trust a chama runs on.