Looking on the internet deeply has found these results:

blackmailed if is the most popular phrase on the web.

blackmailed that 16,200 results on the web	blackmailed if 131,800 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
I wasn't going to be blackmailed Brock Alecksen just gave a sworn statement to the U.S. Attorney saying that you blackmailed him into killing Larry McPhee and Anthony Hicks. I had to find organic fruit and then one of our clients is being blackmailed, not that those two things are connected. Or that he blackmailed us, the happy, wealthy couple I know that. Al grant wasn't the only client that Rick blackmailed. I didn't like that you blackmailed me. I didn't like that you blackmailed my mother and this company.	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

blackmailed that

16,200 results on the web

blackmailed if

131,800 results on the web

More popular!

I wasn't going to be blackmailed
Brock Alecksen just gave a sworn statement to the U.S. Attorney saying that you blackmailed him into killing Larry McPhee and Anthony Hicks.
I had to find organic fruit and then one of our clients is being blackmailed, not that those two things are connected.
Or that he blackmailed us, the happy, wealthy couple
I know that.
Al grant wasn't the only client that Rick blackmailed.
I didn't like that you blackmailed me.
I didn't like that you blackmailed my mother and this company.

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.