Make no mistake!

make no mistake

What I have said or am about to say is absolutely certain; do not think otherwise. Make no mistake, I intend to take this all the way to the Supreme Court if I have to. Make no mistake, this was a carefully orchestrated crime—not some amateur job.
See also: make, mistake, no
Farlex Dictionary of Idioms.

Make no mistake (about it)!

Inf. Do not be mistaken! You can be certain. Sally: I'm very angry with you! Make no mistake about it! Fred: Whatever it's about, I'm sorry. Clerk: Make no mistake, this is the finest carpet available. Sally: I'd like something a little less fine, I think.
See also: make, no
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

Make no mistake !

verb
See Make no mistake about it!
See also: make, no
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • make no mistake
  • make no mistake about it
  • Make no mistake about it!
  • spit it out
  • Spit it out!
  • spit out
  • mean to say
  • and no mistake
  • and no mistake!
  • by mistake