Blog/WhatsApp & mobile money

Savings Group and Cooperative Fraud (Susu, Chama, Tandas)

Rotating savings groups and cooperatives run on trust worldwide, from susu and chama to tandas and stokvels. Collector fraud, fake groups and simple controls that protect members.

CyberWatch AI4 October 2026 · 2 min read
A group of women standing arm in arm outdoors

Rotating savings groups are one of the oldest forms of finance in the world. They go by many names: susu in Ghana, chama in Kenya, tandas in Mexico, stokvels in South Africa, arisan in Indonesia, and more. They work because members trust each other. Fraud happens when that trust is misplaced or exploited.

Common frauds

  • Collector disappears with members' contributions.
  • Fake groups advertised online or on WhatsApp to collect "joining fees". See community group scams.
  • Early takers leave: members who receive the pot first stop contributing.
  • Treasurer impersonation: "the account has changed". See collecting group money safely.
  • "Investment" add-ons promising high returns on the pooled money. See Ponzi schemes.

Simple controls

  1. Join only groups where you know members personally.
  2. Agree written rules: amounts, order, what happens if someone misses a payment.
  3. Use a group account needing two people to approve withdrawals, where possible.
  4. Share records with every member regularly.
  5. Confirm any change of payment details in person.

Formal cooperatives and savings societies are often registered with a government body. Check registration before joining one you do not know.

For more, see investment scams.

Frequently asked questions

What is a rotating savings group?

Members contribute a fixed amount regularly, and each takes a turn receiving the pot. Names vary: susu, chama, tanda, stokvel, arisan, hui and many others.

What are the main risks?

A collector or treasurer disappearing with funds, fake groups created to collect contributions, and members who stop paying after receiving their turn.

How can a group protect itself?

Written rules, a group account needing two signatories, records shared with everyone, and knowing members personally.

Sources

  1. Mobile Payment Apps: How To Avoid a Scam When You Use One, US Federal Trade Commission
  2. Investment Scams, US Federal Trade Commission
  3. Mobile Money Fraud Typologies and Mitigation Strategies, GSMA
Share this article
LinkedIn WhatsApp X
For organizations

Your people get these messages at work too.

CyberWatch AI sends your staff realistic practice attacks, trains the gaps it finds, and shows management exactly where the organization stands.