Is it possible to use another's app merchant id for Apple Pay?

Question

The question:

Is there any way to make app B generate tokens with app A merchant id which will fully work then and pass A's backend validations?

My circumstances:

3rd-party App A :

• This app uses Apple Pay and generates one-time payment tokens which are then sent to their backend server and validated.
• I do not have the source code of the app A
• I also do not have private keys of their Apple Pay merchant profile
• I do have their merchant ID string and anything else I can get from the IPA file

My own App B :

• This is just my app, I can do anything

Answer 1

If this were possible, Apple Pay would be pointless. So, no.