Breach of Agreement

Hi Sir, I have received legal notice via my email two days before. My question was, how i know i received original advocate legal notice or it is fake. Please clarify. If I'm not replied that email, what will happen? The legal notice states "1. That my above-named client is doing business of Business Outsourcing Service (BPO) in the name and style of M/s. INFRA DATA TECHNOLOGY, at his above-mentioned address. You are residing at your above-mentioned address and are known to my client since you availed online BPO assignment of (DATA ENTRY) from M/s. INFRA DATA TECHNOLOGY. 2. That, you as on dated [deleted] completed registration with my client agreed upon the Terms & Conditions/Rules & Regulations by entering into Agreement on Non- Judicial Stamp Paper of Rs. 100/- as on date [deleted] with my client with respect Data Outsourcing 3. Inspite of consistent communications by my client through telecommunication and email you have not paid Rs. 4000/- of utility and maintenance charges and deliberately ignoring my client, knowing full well the grim consequences thereof. You are therefore liable for civil as well as criminal legal action. 4. By this notice, you are hereby instructed to pay the utility and maintenance charges of Rs. 4000/- within 3 days of the receipt of this notice, failing which, my client will straightway initiate legal remedy (civil as well as criminal) at Mumbai court and all the cost and consequences for the said proceedings/prosecution will be on your head of which take a serious note. 5. This notice is given to you because of your default and you are therefore liable to pay Rs. 1500/- as legal charges to my client. Kindly Deposit Rs. 4000/- + 1500/- " Please help and guide me, how to solve this issue. Thank you