I am an Computer Engineer and live in Germany. I have a notably good income and I have no financial problems with any bank or tax etc. here.
I wanted to use "Finanzierung" option for my dishwasher, which allows you to pay monthly rates. Everybody around here including students with much less income was able to get this option from Otto. But when I try to buy dishwasher, Otto directly refused to give me a monthly payment option. When I asked them, they told that, they cannot explain the reason unless I write a paper-letter to them. I became angry and told them that I won't do that and I don't want to buy anything from them, so they directly deleted my account.
In total it was embrassing and I don't recommend anybody Otto at all.