Here's a thing you may have wondered. How to remove some of your group contributions from a group where you are no longer a member? The very first problem is to find the images. For that you have several options.
ip-howto

Search on your photos with the group name

You or someone else may have mentioned the group name on your photo pages. If the group name is unique, then go to your "Photos". Then open the drop down menu from the "Photos". Write the group name there in the search field as an exact phrase between quotation marks:

If you do not get all upper cases correctly, it does not matter. The search is not case sensitive. You will get all images where the group name is mentioned.

Search for your name on the group search

If the group name is very generic (e.g. Roses), then you need to go to the group, and try using the group search. Go to the group frontpage and click "Search?" on the page header tool bar. Then try to search with your account name, or with your nickname. You may have posted additional links where your account name appears, or your nickname appears if it is mentioned on comments. People of course also thank you on their own images, but sometimes they mention your name also on comments under your images.

And if even that does not help, then you have to browse through the group contributions to find at least one of those images.

However, when you find one, then it is easy to proceed. Open one of them in the group context. Do that from right margin's "See also..." section. First click the group name, and then click "Your contributions" below the film strip.


Next click "← Contributions by: Your Name" link on right margin, just above the "ACTIONS" menu.

You will get all of your non member contributions on that group listed. Finally choose small images, and you will get to see "[x]" delete button for all of your contributions.

I also started to go though all of my own photos, as a part of my personal spring cleaning project. The followings turned out. I had and still have several contributions on groups where the only admin has turned out inactive, and has no Club subscription. So, I joined such groups. Then I quit the group to get option to delete all images when leaving. Faster way if there are number of contributions on the same group.

Some group administrators had turned the inactive groups private when leaving. I do not know what the logic is there, because one then can not join such group. There is no-one letting in. So, I had to remove my contributions on such groups one by one..