If you have been in accra africa for a month and want to leave for ireland do you need a bank account for immigration?

No,

I bet this is a person you never meet and they either are deeply in love with you or they are going to share some great wealth with you for helping them get out of the country? Is that close.
That is how this almost world famous scam works, although there are dozens of variations.

Then of course they often get robbed, lose their passport or something like that I you actually sent money to start with.

If the person is not a citizen of Ghana ( that is the country Accra is in) all they have to do is contact their countries embassy and they will assist them in getting home.

Next if you have only been in Ghana for a month you are not immigrating you are merely traveling to another nation or back home.