Complaints must be in writing and addressed to the Complaints Receiving Officer (CRO). You may follow the format of the sample complaint letter below or simply fill out the complaint form.

Sample complaint letter

Complaint form

You can submit these documents using any of the following contact details:

You may also hand deliver your letter to any ADB resident mission or the CRO at ADB Headquarters. Complaints may be submitted in any of the official or national languages of ADB's developing member countries.

Once your complaint is received, the CRO will acknowledge and register your complaint; clarify your complaint (if needed); provide information about ADB's Accountability Mechanism; and based on your choice of function, will forward the complaint either to the Office of the Special Project Facilitator (problem-solving function) or the Office of the Compliance Review Function.