Firstly, take the code from below and copy it
Then create a new thread in the Alchemy Contract Requests folder, as linked above.
Paste the code into your blank thread, and fill out the appropriate information
Title the thread "Alchemy Contract [your name] - [contracted alchemist's name]"
If you have not already spoken to an Alchemist of Oleander who has agreed to take on your contract, title your thread "Alchemy Contract [your name] - OPEN"