(NewsNation) — Amazon is heading to court this week over allegations the company made it too difficult for Prime members to cancel their subscriptions.

The Federal Trade Commission has accused Amazon of using deceptive design features, known as “dark patterns,” to trick consumers into enrolling in its Prime service and keep them from leaving. Prime costs $139 annually or $14.99 per month, and offers perks such as faster shipping, free returns and access to Prime Video.

Launched in 2005, Prime is the world’s largest paid subscription service, with more than 200 million members. The FTC has argued Amazon used confusing design tactics to push as many as 40 million people into signing up while making it challenging to cancel.

Jury selection is scheduled to begin Monday, according to the New York Times, and opening arguments will start on Tuesday. The trial is expected to last about a month.

FTC: Amazon Prime too complicated to cancel

According to the FTC, Amazon made it difficult to buy products without also subscribing to Prime. In some cases, the commission alleged, checkout buttons would complete a purchase and automatically sign up the customer for Prime without transparent disclosure.

Canceling was even more challenging; regulators said the process could take up to four pages and 15 steps, with an internal codename for the cancellation process allegedly called “Iliad,” a reference to the ancient Greek poem about the lengthy siege of Troy during the Trojan War.

The FTC has argued Amazon’s practices violated both the Federal Trade Commission Act and the Restore Online Shoppers’ Confidence Act (ROSCA). The lawsuit is seeking fines, customer refunds and a permanent ban on these tactics.

Amazon denies FTC’s allegations

Amazon has denied the claims, stating that its customers are aware of what they’re signing up for.

“Neither Amazon nor its executives did anything wrong,” the company said in a statement. “We remain confident the facts will show we acted properly, and we always put customers first.”

Prime is Amazon’s largest revenue driver, accounting for three-quarters of sales, with members spending about twice as much as non-members.

Judge rules Amazon violated shopper protection law

A preliminary judge, U.S. District Judge John Chun, handed a partail win to the FTC, ruling last week that Amazon broke federal law by collecting billing information before disclosing key payment terms.

Chun also ruled that two Amazon executives were liable for any violations the FTC proves at trial, while barring Amazon from arguing that ROSCA didn’t apply to Prime signups.

Still, jurors will now decide whether customers truly gave consent and whether cancellation was unfair.

What does this mean for consumers?

If the FTC is successful, Amazon could face fines, customer refunds and new rules for signing up and canceling Prime.

The case could ripple far beyond Amazon, potentially reshaping how subscription services, from streaming platforms to software companies, handle sign-ups and cancellations.

The Associated Press contributed to this report.