Subway sandwiches can be a perfect meal when you're on the run, or want to eat out but don't feel like deep fried everything.

Sure, it can get a little pricey for a sub. But the choice and convenience is usually worth it.

But one Subway sandwich artist, who is choosing to remain anonymous, says there are actually a few ways you can get FREE food from the chain. He also reveals what you want to avoid on the menu at all costs.

"I'm very close friends with the RM (regional Manager) and the DM (district manager)," says the source. "And I've learnt many things about the company many people may not know (and in some cases, may not want to know)."

How To Get Free Food

The first way to get free food is pretty obvious: complain.

"Look really distressed and disgusted with how they're making your sandwich. Order something, and take it to your seat, open it. Walk back and tell them it's not made right. 9 times out of 10, they'll just make you a free courtesy sandwich."

If that doesn't work, next time try the opposite.

"Another way is to be extremely nice," he continued. "Start a lot of casual conversation and engage the sandwich artist. Then when he's ringing you up, look into your wallet and exclaim 'Oh s***, I thought I had more cash! I wont have enough. Again, it's a gamble, but if you play your cards right, you'll get a discount of some kind..."

Go to the next page to see the secrets Subway doesn't want you know!

What You Don't Want To Know

After a recent study showed Subway doesn't REALLY use chicken in their sandwiches, this employee is adding more to the list of worrying Subway practices.

"On our food containers we are required by state law to label when it was made, what day, what time, and who prepped it. We will routinely change these labels to dates further ahead than when they were prepped so we can use them after they 'legally' spoil (which to be fair, is only after like two days. But still...)"

"I also know how dirty our cutting boards are. Let me sum it up for you, the deli-paper your sandwich is made on (just from coming into contact with the cutting board) should be considered a health biological hazard. In fact, if you notice an employee wrapping your sandwich in deli paper THEN the sandwich paper, tell them the f*** not to. Trust me."

What To Avoid

"Early mornings ask if the meatballs are fresh," the sandwich artist advises. "You'll be told 'yes' no matter what, but if they have to go check it's actually a guaranteed no, they're checking to see if they can pass as fresh."

"Trust me, meatballs are annoying to prep, we know damn well if they're fresh or not without needing to check. Otherwise just be careful about the roast beef, because that tends to go bad the quickest."

"If the American cheese cambro (container) is almost empty, there's a good chance the cheese is soggy. Not a big issue, but...still."

Pretty concerning for a restaurant who claims to serve fresh food. Will this change your mind about eating at Subway?