In my opinion, permitting a prospective employer to contact your current employer early in the application process is not advisable. Here's why:

• Alerting your current employer:  They might find out you're looking for a new job, which could cause tension or affect your current standing.
• Better alternatives: Your verification can be done with references or through previous employment verification services.

However, there are situations where you might consider it:

• Later stages: If you're a finalist for the position and have a good relationship with your current employer, you might be comfortable allowing it.
• Proactive approach: You can mention you'd be happy to connect them to your current manager after you receive an offer.

Here's what you can do:

• Request they hold off: I politely request they wait to contact your current employer until you've advanced.
• Suggest alternatives: Offer to provide references or verification details from previous employers.

Remember, it's your right to control the job search process. By being strategic about reference checks, you can protect your current employment while presenting yourself well to potential employers.