Twitter can be a cruel, cruel place when it wants to be, and right now we have Nick Lutz to thank for that one.

In a post which has amassed a staggering 301,000 likes since its upload three days ago, Nick has left Twitter in no doubt that when it comes to past relationships, he's got no time for chancers.

Sharing a photo of a heartfelt letter which was penned by his ex-girlfriend, Nick revealed that while he had indeed taken the time to read the detailed apology, he also took the time to grade it and return it to her.

With the help of a red pen, Nick advised his ex that certain statements she made throughout the correspondence needed further clarification before he could award her a higher grade.

"Long intro short conclusion. Strong hypothesis but nothing to back it up. Details are important," he wrote.

"If you want to be believed, back it up with proof. You claim that cheating never occurred but place blame on yourself – then what for? Need to stop contradicting your own story and pick a side. While this gesture is appreciated, I would prefer details over statements."

And it's not just Nick who is willing to grade the letter, with countless Twitter users weighing in on the various errors exhibited throughout.

"Should have failed her. You missed that she listed "a lot" as one word in her intro," wrote one while another added: "Misspelled that so I say they should get a 58."

Ah lads…