Recover USD 400 Debt, India

I have a signed contract that clearly shows an Indian client from Patna — Bihar 800013 owes me USD 400 and has ignored every reminder for almost a year.

Your first task is to assert that claim formally, demanding the full USD 400 plus an additional USD 100 to cover this legal action, exactly as I have instructed: “Claim USD so the lawyer can have USD 100 paid.”

Here is what I need from you, a Indian-registered lawyer:
• Draft a legally sound demand/notice on your letterhead that cites the contract, relevant provisions of the Indian Contract Act and any applicable state law.
• Dispatch the notice by a trackable method (registered post / courier and email if possible) and provide me with proof of service.
• Prepare a brief next-step strategy in case payment is still not made, outlining options such as negotiation or filing a civil suit in Patna.

I will supply scans of the contract and all prior correspondence immediately after award. A concise, professional notice and solid evidence of delivery are the key acceptance criteria.