I resigned due to a number of red flags that presented themselves quite quickly. It wasn't a good career move and I am disappointed. I resigned effective immediately yesterday via email due to being in training and having no responsibilities assigned to me.
My former manager has contacted me via email to ask for a phone number to contact me. This is so we can undertake formalities. I'm confused because they would have my phone number. I would also prefer to undertake formalities via email.
Would it be okay to tell them that email is my best form of contact for this process? I would prefer to have everything written.