I’ve noticed there’s a possible means of avoiding getting blacklisted.
If you have more than one active contract with the same entity, and one is failed, when you complete the other, then you can save your reputation. What I noticed is that when you fail the first contract, it’ll send you the blacklist email. When you complete the other contract, it’ll tell you that you’ve impressed them and they’ll give you more in the future.
I’ve done this having a hard contract and an easy to the same station. I’ve also done it after the station decided to refuse its goods for the contract by very quickly obtaining another contract for the same corporation before the black-list email went out and then completing it.
I thought I’d put this out there for folks having issues with blacklisting. I’m only so-so at avoiding it lately…