You just called a prospective candidate with a job offer, and they accepted. Pretty standard procedure — except you won’t meet the new hire until their first day of work.

In a hot job market, more workers are being hired without ever doing a formal face-to-face interview, according to a recent article in the Wall Street Journal. Hiring agencies and HR professionals are hearing more and more about hiring sight unseen, and the reviews are mixed. Agencies say it’s a fast and more efficient way to hire, while some HR professionals argue there’s no substitute for human interaction.

“We basically advertised jobs as call today, work tomorrow,” says Tim Gates, senior regional vice president of Adecco Staffing, which recently filled 15 openings without a formal in-person interview. “It makes it convenient for everybody involved.”

Adecco Staffing uses a digital hiring platform to prescreen candidates before setting up phone interviews. Applicants who ace the 20-minute phone conversation will likely be placed at a job site contracting Adecco. Gates says the practice gives his staffing agency a competitive edge by hiring people before they accept another position. He also believes this fast, straightforward approach is more attractive to job seekers seeking immediate employment.

Adecco hires sight unseen for entry level, manufacturing and specialized positions — like graphic design. They’re not alone. Susan Trettner, founder and director of direct hire placement firm Talent Direct 360, works with industries across the board but often hires workers for engineering, IT, HR, sales and marketing roles. Trettner says hiring without meeting a candidate is becoming more commonplace, especially for retail and e-commerce employers who have to hire large numbers of workers.

“Making a hiring determination over the phone is acceptable, and I think a lot of companies are doing that,” she says.

During the holidays, for example, retailers may not have the time to interview hundreds of candidates for a position, Trettner says. But, she adds, many companies that hire employees without meeting in person often have a “game plan” for onboarding that gets workers quickly up to speed on what they will be doing on the job. Making the hiring process more efficient is better for everyone, she says.

“It all comes down to filling the positions so they can remain productive,” she says.

Trettner says she would consider hiring workers without meeting them, but at the end of the day, it’s up to the employer client. If a client, for example, needs 300 new workers in a short period of time, Trettner says she would suggest they consider expediting the hiring process a bit to help save money and time.

“I open them up to anything I think is efficient,” she adds.

Some organizations would rather take extra time choosing candidates. Kathleen Sheridan, associate director of global staffing for Harvard Business Publishing, says she knows from 20 years of experience that phone interviews can’t tell you everything about a person. She once sat down with three candidates for a sales position; they all performed well during a phone interview, but completely fumbled while answering questions during a sit-down meeting. None of them were hired, Sheridan said.

“You can come across as a completely different person over the phone,” Sheridan says. “As cumbersome as interview process can be, the value of bringing people in and allowing them to see you is worth it.”

As someone who works with people on a daily basis, Sheridan says she would be distrustful of any job offer from someone she’s never met. She says higher-level executives at Harvard Business Publishing will travel out of the country to meet with prospective hires.

“A decision to join a company is emotional as well as very practical. I think you need to give people a chance to check their emotional response and get a feel for the culture and vibe,” Sheridan says. “I would ask myself, ‘what is it about your organization that you would deny me the opportunity to meet the people who are in the headquarters of this company that I’m going to represent?’”

Peg Buchenroth, HR director of employment agency Addison Group, says most of her clients request in-person interviews for job placements in the IT, engineering, healthcare and finance accounting industries. She says it’s unlikely to change.

“It’s maybe more common in the seasonal retail industry for the holiday season. For our types of positions, there’s no reason not to interview when we have the ability to do Skype interviews,” Buchenroth says.