# Do not overwrite tag OR append to tag

**URL:** <https://community.mp3tag.de/t/do-not-overwrite-tag-or-append-to-tag/51645>\
**Category:** Web Sources Discussion\
**Created:** [January 18, 2021, 6:52pm UTC](https://community.mp3tag.de/t/do-not-overwrite-tag-or-append-to-tag/51645 "2021-01-18T18:52:34Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![taggert](https://community.mp3tag.de/letter_avatar_proxy/v4/letter/t/96bed5/32.png) [@taggert](https://community.mp3tag.de/u/taggert)\
**Post date:** [January 18, 2021, 6:52pm UTC](https://community.mp3tag.de/t/do-not-overwrite-tag-or-append-to-tag/51645/1 "2021-01-18T18:52:35Z")

</div>

Hi,

When using source scripts is there a way to check if a tag already exists and, if it does, either choose to not overwrite the exiting value OR append a value to the existing tag?

Examples of this would be:  
if composer tag exists do not overwrite with a new value  
if genre exists append the new genre to the tag (existing list of genres)