Hi everyone. I am expected to receive a formal offer from an MBB firm in the middle east next week. I had a meeting with HR last week to let me know I was accepted and to detail the terms of contract for me. She advised me to kickstart my BG check already and register on the website of the providers. They asked for employment certificates, payslips, transcripts, and passport information. I know they will contact my previous employer since I consented to it upon registration. On the certificated you could see the title and dates as they are on my CV. However, I am particularly worried about the prospect of reaching out to my former manager as we left on extremely bad terms. I was hired on a FTC (at a development bank. FTCs is the common thing for entry level jobs) and I wasn't extended. She gave terrible comments about me to other teams I applied to at the bank as they would obviously reach out to her for comments. I know this because she told me she'd give negative comments about me in case she was asked. Such comments had little to nothing with my performance but rather my character as she thinks I constantly disrespected her by shying away from social events involving her.
I'm concerned she might do the same here. Should I worry?