How to avoid duplicate data entry

1. What is the issue? Please be detailed.
duplication in data entry form

2. What steps can we take to reproduce this issue?

3. What have you tried to fix the issue?

4. Upload any forms or screenshots you can share publicly below.

Dear @Ashwinimanwar,

It is helpful to give more details about your problem, so others can understand it well and offer a better solution. The more you explain, the easier it is for someone to help you effectively.

Let me try to answer based on how you can avoid entering the same information more than once when using ODK Collect.

Firstly, instead of manually typing information that already exists, use a feature that lets you pick from what's already there. This helps in avoiding duplication because users won't re-enter data that's already in the system.

Secondly, you can create rules in the form to stop people from entering the same details again. For example, if you're collecting ID numbers, you can set a rule that prevents adding an ID number that's already been used.

Additionally, the form can be designed to give a warning if someone tries to input data that matches what's already been recorded. This alert signals the user that they might be entering duplicate information.

After data is submitted, there could be a process that automatically checks for duplicates in the collected information, ODK Central can assist on this or you can use statistical tools like STATA, R, etc to do so. This ensures that even if some duplicates slip through during data entry, they can be identified and handled afterward.

Lastly, educating the people entering the data about the importance of avoiding duplicates can significantly help in preventing them. When users understand why it's crucial to enter information only once, they're more likely to pay attention and follow the guidelines to prevent duplicates.

I hope this information is useful to get you started.

thanks@Joseph_Muganga ,but can you please explain it in details by giving some code of examples ,we allow user to enter id in webform which contains digit in which first two character(we provide them series MH,GJ...)and last three are Numbers (eg MH101)
Thanks again