# List variable's 'Does List x Contain" Case Sensitivity Behaviour is Undesirable **URL:** \ **Category:** Questions about Thunkable X\ **Tags:** lists\ **Created:** [November 9, 2019, 11:45am UTC](https://community.thunkable.com/t/list-variables-does-list-x-contain-case-sensitivity-behaviour-is-undesirable/311024 "2019-11-09T11:45:11Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![itmanager](https://avatars.discourse-cdn.com/v4/letter/i/edb3f5/32.png) [@itmanager](https://community.thunkable.com/u/itmanager)\ **Post date:** [November 9, 2019, 11:45am UTC](https://community.thunkable.com/t/list-variables-does-list-x-contain-case-sensitivity-behaviour-is-undesirable/311024/1 "2019-11-09T11:45:11Z")
Greetings Thunkers! In trying to make sure no duplicate entries ended up in a list I discovered that the “Does List x Contain” method block is case-sensitive. (illustrated in screenshot) ![33](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/b/7/b78f2fe2972ada0ebcdccab279613a1f46df35e7.png) As a workaround, setting both the input value to be tested as well as all saved values to Title Case is a reasonable way to achieve the desired results for this particular case, but it would likely be annoying for anyone who may be storing case-insensitive (displayable) data in a List while trying to avoid duplicates. [https://x.thunkable.com/copy/1d853dc66bb17596a2f9174472ef483d](https://x.thunkable.com/copy/1d853dc66bb17596a2f9174472ef483d) Meanwhile I suggest a new feature on the “Does List x Contain” method block to allow the choice of case-sensitive or case-insensitive matching. I hope this helps someone! ---
**Author:** ![domhnallohanlon](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/domhnallohanlon/32/29554_2.png) [@domhnallohanlon](https://community.thunkable.com/u/domhnallohanlon)\ **Post date:** [July 16, 2020, 2:32pm UTC](https://community.thunkable.com/t/list-variables-does-list-x-contain-case-sensitivity-behaviour-is-undesirable/311024/2 "2020-07-16T14:32:10Z")
Hey @itmanager - you can use the `to UPPERCASE` block to transform the input text to any of the following: ![Screenshot 2020-07-16 at 15.30.17](https://us1.discourse-cdn.com/flex015/uploads/thunkable/original/3X/3/6/36bb7d49db6dd81539259d8ceb8058ea140166b3.png) Hope that helps! ---
**Author:** ![ioannis](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/ioannis/32/146956_2.png) [@ioannis](https://community.thunkable.com/u/ioannis)\ **Post date:** [November 8, 2024, 12:08pm UTC](https://community.thunkable.com/t/list-variables-does-list-x-contain-case-sensitivity-behaviour-is-undesirable/311024/3 "2024-11-08T12:08:23Z")