How can we remove an option if selected in previous submission

[Kal_Lam]

If you are looking at something that has been discussed previously, kindly please be informed that it’s not possible at the moment:

How can we avoid duplicate data collection while submitting the form?

Kindly please be informed that KoBoToolbox at the moment does not support this feature. FYI, Maybe you could be cautious while collecting data (where enumerators are allocated with specific respondents and they collect data from the same i.e. not going out of the samples they have been provided). The other option is during data management (where the data manager cleans the repeated samples if there are any looking at key identifiers such as name etc. set while developing the survey tool).