Upon match end, by either manual end via the 'Match Actions' or 'Match Status' screen, or via a score prompt (e.g. all out, 2nd batting team passes 1st batting team total etc) a confirmation prompt appears asking if you wish to end the match.
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Upon pressing 'Done', the match Match Submit message will appear warning you that you will not be able able to make any scorecard changes once submitted. Once OK has been pressed, the match scores and result will sync to MyCricket and you will be directed to the match list where your match will show in the completed section.
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