Your client can issue a single legal notice for all 9 cheques, including the 8 dishonored cheques and the 9th cheque, which is due after 2 months. This notice should be issued under Section 138 of the Negotiable Instruments Act, 1881. After issuing the notice, your client can file a single complaint under Section 138 for all 9 cheques. However, the complaint should be filed within 30 days of the notice period expiring. It's important to note that the complainant must specify the exact amount of each cheque, the date of presentation, and the date of dishonor in the complaint. Additionally, the complainant should also attach the relevant documents, such as the cheques, bank memos, and legal notice. It's recommended to consult with a lawyer to ensure the notice and complaint are properly drafted and filed. Here's a general outline of the steps: 1. Issue a single legal notice for all 9 cheques under Section 138. 2. Wait for the notice period to expire (usually 30 days). 3. File a single complaint under Section 138 for all 9 cheques within 30 days of the notice period expiring. 4. Ensure the complaint includes the necessary details and attachments. Please consult with a lawyer for specific guidance on this matter.