How to transfer/move AWS EC2 Instance from one account to second another

First login account  select instance then go to Action tab --- image-- create image go to -- AMIs select recent created snapshot Action --- Modify Image Permission and --- Add (second) AWS Account Number and --save.

Now go to second account Launch Instance ---- My AIMs -- you will get that instance name just select same and continue wizard.

If worst case you face any issue just make snapshot modify image as public.