You don't use 'in case' or 'just in case' to state that anything will materialize on account of another thing occurring. You don't say, for example, 'I'll go in case he asks me'. You say 'I'll go if he asks me'. see also case said — case in Main : https://case-study-solution39630.ivasdesign.com/56975942/how-case-help-can-save-you-time-stress-and-money