Can I use my own local supplier instead of the listed ones?

[John284]

I just wanted to know if I can use my own supplier from the neighbourhood instead of using the ones from the supplier list 

if yes how can I do this 

[John284]

Thank you this was very helpful,I just also wanted to ask how do I send orders from my store to a supplier.

[John284]

will it be possible for me to send a pdf with the order details to the supplier 

also which apps are best with the automation of this process.