Don't take this too hard: Your autograph isn't worth what it once was.

American Express, Mastercard and Discover have announced that, starting in April, they will no longer require signatures on any U.S. and Canadian credit-card purchases. (American Express is making the change for its transactions worldwide.) Visa hasn't announced any plans to do the same. But there's speculation it may eventually do so.

That pretty much would fully evaporate what may be the most common reason U.S. consumers still bother writing their signatures, which were once the most prominent symbol of financial integrity and proof of identity. (It's also another blow to the general use of cursive writing, for those who remember what that is.)

"Signatures may be going the way of the lava lamp," said William McCracken, president of Phoenix Synergistics, a consumer market-research company focused on the financial services. "They will not be part of Gen Z. Signatures won't be part of their stored memories."

The shift away from signatures also hints at the fantasy we all pretended to believe: that signatures actually proved something.

"The industry's unspoken secret is that signatures on a credit-card receipt are relatively worthless from a security standpoint," McCracken said.

A thief only had to look at the signature on the back of a credit card, practice it a few times, and come up with a fake good enough to pass. But even that involves some quaint thinking. Because almost no one in places where we shop or dine is even glancing at signatures these days, whether we sign on paper or a glitchy electronic pad using a faulty stylus or a finger.

Signatures are still used on plenty of legal property documents, government-issued IDs, artwork, acknowledgments of medical privacy notifications, cards to Grandma, and anything fans can ask celebrities to scribble on.

Yet in other ways, signatures have been slipping from the economy. Instead of putting his "signature" on new dollar bills earlier this year, U.S. Treasury Secretary Steven Mnuchin used a handwritten mix of upper- and lower-cased block letters that could have been thumbed out on a smartphone.

Signatures became less necessary as check-writing shrank. And while credit-card use continues to grow — there were more than 37 billion U.S. transactions last year totaling $3.27 trillion — most of that is going unsigned.

John Hancocks aren't required on typical online purchases. And credit-card firms already have scaled back signature requirements on small transactions. More than 75 percent of face-to-face Visa card transactions in North America don't require people to sign their names, according to a Visa representative.

Which is just as well. Who hasn't gone to sign for a credit-card purchase using a pen that doesn't work and "you just scribble anyway," said Kim Sullivan, senior director of payments solutions for transactions technology giant NCR.

Dropping signature requirements should speed up lines at retailers, Sullivan said, which is exactly what store owners are looking for.

"It's going to improve the experience" for merchants and consumers, she said. "It's all about faster and frictionless."

Sullivan estimated that eliminating signatures might save an average of three seconds on each credit-card transaction. So retailers can increase the number of customers they serve and generate more money, she said.

Some customers may feel a little unsettled with the idea that purchases worth hundreds or even thousands of dollars could be made without signing anything. Security is already the biggest concern people have about using credit cards, said McCracken, of Synergistics.

For now, there has been no widespread rush to require use of PIN codes with credit-card transactions in the United States. And some consumers are creeped out about the idea of entrusting credit-card companies with personal biometric data that could help verify their identities.

Other security measures are already in place, such as checking credit cards' three- or four-digit CVV numbers, asking consumers for their billing zip codes, adding computer chips to more cards, and monitoring for unusual purchasing activity.

But the cruelest reality of saying goodbye to our signatures is this: They already have so little value there isn't a sweeping rush to replace them with something new.