If you don't follow the terms you mentioned in OP (take a picture...) then yes they can try and say they deposited into wrong account in which case bank might revert the transfer. So take any and all precautions necessary.
Thanks for your response! Will it be enough to ask to take a picture? I saw couple times that people also asks to rip receipt into pieces and then send a picture.
Like I said, take all the measures which reduces the risk of charge-back, it maybe a little difficult to get buyers but better safe than sorry.
Also, can somebody clarify for me how to create one ad for two banks? Or I just need in payment details mention both bank account numbers and a buyer will choose by himself what bank to use?
Yes, just create one ad and add both bank details and buyer can decide which one to use according to their preference.