OK, I'm trying to explain in more details then. I have no blog link but maybe I'll write a post about it :)
Disposition action (on of the 6 options) is mandatory for return orders. You will setup Disposition code linked to one of thèses.
Credit (inventory consequences) : get back your item into stock, so you'll have a stock transaction + xx
Credit (Financial consequences) : your Customer will get a credit note.
Example : I have sell an iPad to custA, he's not happy with the colour so he returns it. My iPad is working so I put it back in stock; he will receive from me a credit note.
Credit only (inventory consequences) : nothing because the goods remains in the hand of your Customer. He never send you back the item. But, in Ax, you will see +xx and -xx in the transaction.
Credit only (financial consequences) : your Customer will get a credit note.
Example : I have sell a cake to custA, he's not happy because bad taste or something else. He won't send it to me because I won't put it back in my stock and he has already eaten it; he will receive from me a credit note from me.
Scrap (inventory consequences) :You receive the item, and he will automatically put in scrap after running the packing slip. It means you will have a +xx after registration and -xx after running the packing slip.
Credit (Financial consequences) : your Customer will get a credit note.
Example : I have sell a cake to custA, he's not happy and when he taste it he was very upset; so I wanted to run some quality tests before put it in the trash that's why I ask him to send me the sample. After testing, I put it in trash.
Replace and scrap : idem than scrap + a new replacement SO is created (it means you'll have 2 SO and 1 return order for that process)
Replace and credit : idem than credit + a new replacement SO is created (it means you'll have 2 SO and 1 return order for that process)
Return to Customer (inventory consequences) : +xx when receiving, -xx when sending back to the Customer
Return to Customer (financial consequences) : nothing particular except if you add some charge/freigths.
Example : I have sell an iPad to custA, he's not happy because it doesn't work so he send it to me. But after receiving it, I run some tests and it works well. So I send it back to my Customer with delivery freigths.
More clear ?
Regards