1. Select an item in the BrickLink catalog. Refer to Additional Information About Step 1 below for further details.
2. Enter the inventory changes that are being requested for that item. Refer to Additional Information About Step 2 below for further details.
3. Verify the inventory changes that were entered. Refer to Additional Information About Step 3 below for further details.
4. Submit the inventory changes to an Inventories Administrator for consideration. Refer to Additional Information About Step 4 below for further details.

• Add - Add new item to the inventory.
• Delete - Delete an existing item from the inventory.
• Change - Change attributes of an existing item in the inventory. (Change Item, Color, Quantity or Type)

• Action - A (Add) or C (Change) or D (Delete)
• Inv Item ID - Inventory Item ID of the item to Change or Delete. Find out this ID by clicking on the link "Show item IDs" on the bottom of each inventory screen or by clicking on the "Inv" link next to the name of the Inventory Item you are making changes to on Step 2 of the form.
• Type - If a value of this field is set to Alternate then the Match ID should be supplied.
• Match ID - This field is an incremental sequence of numbers and is used to identify those parts which differ between versions of the same set (Alternates). Match ID numbers start at 1 and are incremented by 1 for each match.

  Example: in one version of a set there is a black door but in another version of this door is white. In this case the inventory change requestor would first change the existing part in the inventory (the black door) to show that it has an Alternate part by setting the match ID field to the next available number in the sequence. The next step is to add the new part (the white door) by setting the Type field to Alternate and putting the same number that appears in the Match ID field for the black door part in the match ID field.

Notes:
• The Alternate parts section is intended to list only those items that differ between official LEGO releases of the same kit.
• List parts with stickers applied as Counterparts. To speed up the process, please add book and page numbers of the Instrucions in your comments, if you are adding just one or a few stickered parts to a Set Inventory.

• On Add - All fields are required except Item Inv ID; which should be left blank. Color ID is required for Parts and Gear only; otherwise leave color ID blank. Alt and Match ID are only required when creating a link between two parts which appear in different versions of the same set.
• On Delete - Enter Item Inv ID and leave rest blank.
• On Change - Enter Item Inv ID and new values in the fields you want to change. Leave fields you don't want to change blank.

You can also add additional comments about each request. They will appear in the discussion forum post generated by the request. Under column "Replies" in the Inventory Change Log, a count of the replies posted for that request is shown. Click on the () icon to view the message thread of the request in the discussion forum.

• Can't add an item to an inventory if the same item with the same color, quantity and extra flag is already in the inventory.
• Can't delete an item from an inventory if the same item with the same color, quantity and extra flag which you specified to delete is not in the inventory.
• Can't submit a request to add or delete exactly the same information as a request submitted in Pending status.
• Can't add items to an inventory which are marked for deletion in the catalog or have not been approved yet.