How do I change the one who donates land on a group owned land?

[Peewee Musytari]

Yes

I assume they have both donated their free 512 allowance so that you are paying no tier fee for the 1024sqm.

If you go to group info Land tab &  one removes their contribution & the other increases their contribution to 1024.

The one taking over the 1024 will also need to increase the tier level on the website and pay $5 per month tier fee.

[Peewee Musytari]

Yes

I assume they have both donated their free 512 allowance so that you are paying no tier fee for the 1024sqm.

If you go to group info Land tab &  one removes their contribution & the other increases their contribution to 1024.

The one taking over the 1024 will also need to increase the tier level on the website and pay $5 per month tier fee.