We just had an item returned illegally. It was made the exact size of the land and centered.

[Innula Zenovka]

Depending on how the item is made, its bounding box may be rather larger than its apparent, visible, size, and thus impinge in your neighbour's land without it seeming to.

[Innula Zenovka]

Depending on how the item is made, its bounding box may be rather larger than its apparent, visible, size, and thus impinge in your neighbour's land without it seeming to.

[Theresa Tennyson]

It's impossible to return an object unless part of it extends onto the land it's being returned from. If your prim was exactly the size of the lot then it may have accidentally been moved when you were editing something else or it may have moved slightly due to "prim drift" - rounding errors in the server programming can cause prims to move very slightly over an extended period of time.

[KarenMichelle Lane]

Amor,

First of all issues regarding prims and returning objects have no meaning to statute laws in real life thus there is not an issue of legality involved. The Linden Lab Terms of Service [TOS] is the applicable authority in any dispute issue.

The ability to return "intruding prim objects" was added to the Server code and finally released for use in the SL Viewer Release in 2012.

Parcels are delivered in dimensions which are a multiple of 4m. So a standard square 1024 sqm parcel is 32m x 32m in size. A standard square 4096 sqm parcel is 64m x 64m.. A parcel does not need to be delivered as a square so that same 1024 sqm parcel can also be delivered as any multiple of 64 - 4m x 4m units and so on as parcels get bigger and bigger.

It seems to me that your prim sized 60m x 36m will center nicely on a 4096 sqm parcel sized 64m x 64m but on any other smaller parcel shape configuration for that 4096 sqm it certainly would extend over the parcel edges.   

Could you have intruded without knowing it? What are the dimensions of your parcel in meters? 60m x 36m? If you did not lock it [a simple platform] in place then prim drift could certainly have occurred. If it is a complex build with that [general] size then parts of the build could be intruding into your neighbors parcel without affecting their prim count. Regardless, the intrusion allows the use of the Return Object option on the Edit Object / Management Menu.

 

[Lindal Kidd]

One way to keep your objects on your own parcel:

1. Make your parcel borders visible with World/Show More/Property Lines
2. Turn off rendering of water or prims if you can't clearly see your borders.  Advanced menu (CTRL+ALT+D), then Advanced/Rendering Types.
3. Place a skinny prim pole (I usually use 0.5x0.5x10m) at each corner of your parcel.  If your parcel is rectangular in shape, you can simplify this by rezzing a single platform and stretching it to exactly cover your parcel.
4. Check from several angles to make sure the platform or marker poles are completely within your borders.
5. Edit the Z position ONLY of the marker(s) to put them at the height where you plan to build.
6. It's a good idea to allow for a bit of slop.  Don't bring your objects all the way up to the border.  Try to leave a meter or so of wiggle room.

As KarenMichelle points out, some objects can look like they are within your borders, but not be...any prim that is Path Cut, for example.

[Amethyst Jetaime]

It is possible that over time it did drift onto your neighbors land some what,  If any part of it did, the neighbor could return it to you as it encroached on his property.  Prim drift does happen. 

Other than this, the only way a neighbor could have done this is if they had your mod rights or is a member of the group that owns your land and has the group authority to return things.   It is impossible to go on someone else's land and return something otherwise.

[steph Arnott]

Rather than thinking your neighbour is having a pop at you and getting into a escalating tit for tat scenario, just say sorry and you was not aware it had drifted. Not sure what the "illegal" attitude is, but getting on with people is a lot less hassle.