According to the search results, the term "Non-ECR category in passport" refers to a category of Indian passports that do not require Emigration Clearance while traveling to a particular country. ECR stands for "Emigration Check Required" and is a category of Indian passports required by Indian residents for employment purposes in specific countries. To determine if a passport is Non-ECR, one needs to check the passport for any ECR stamp or status. If there is no ECR stamp or status, then the passport is Non-ECR. The following individuals are eligible to get the Non-ECR passport:

• All Indian citizens who have never held an Indian passport
• Indian citizens who are not eligible for ECNR (Emigration Check Not Required) status
• Indian citizens who are eligible for ECNR status but do not have the supporting documents

The documents required to apply for a Non-ECR passport include:

• Proof of address
• Birth certificate
• Educational qualification certificate

However, the exact documents required may vary depending on the applicants circumstances.