How to create unique ID using combination

[Kal_Lam]

Welcome to the community, @ready2readchallenge! You should be able to do it as outlined in the post discussed previously:

Automatically displaying unique ID number

Hi @Dhamai, Welcome to the community! Please see the image below to create an automatic display of the household identification number (you will need to do this in the xlsform): [Picture%201] You will then see the household identification number in the output as follows: [Picture%202] You could also have a look at the support article on How to: Create Sequential, Unique Serial Numbers.