This is an accepted solution.
Hank here from Shopify.
Can you tell me a bit more about why you are needing your Merchant ID, purely so I can ensure I have given you the correct information you require?
In some situations, we cannot provide this as it may not be the required information needed, but let me know, and I will gladly assist you further.
All the best,
Thank you for confirming.
What I will need to do is get a bit more information. Now as this is account specific, I will just need to verify your account. I will send you an email to the email address attached to this forum's account and confirm some security questions about your store.
Once you reply to that email, I will look into this further for you.