Why isn’t STACKED sending connection requests?

If STACKED isn’t sending connection requests, it doesn’t necessarily mean there is a problem with your campaign.

Connection requests can stop or remain queued because of your STACKED daily limits, the number of invitations already pending on LinkedIn, or restrictions applied by LinkedIn itself.

Work through the checks below to identify the cause.


Check your daily connection request limit

By default, STACKED is set to send a maximum of 20 connection requests per day.

Once your daily limit has been reached, additional connection requests will wait until STACKED can process them the next day according to your Planner settings.

You can review your limits under Settings → Throttling when using the Expert UI.

Increasing your STACKED limit won’t override limits or restrictions imposed by LinkedIn.


Check your pending LinkedIn invitations

Having a large number of unanswered connection requests can affect your ability to send additional invitations.

To review them on LinkedIn:

1. Open My Network.

2. Select Manage all.

3. Open the Sent invitations tab.

4. Review your outstanding connection requests.

If you have accumulated more than 300 pending invitations, consider withdrawing older requests that are no longer relevant.

You can withdraw invitations manually on LinkedIn or use STACKED’s pending invitation withdrawal functionality.


Avoid withdrawing invitations you intend to resend. LinkedIn may prevent you from sending another connection request to the same prospect for a period of time after an invitation is withdrawn.


Check whether you’ve reached a LinkedIn connection request limit

LinkedIn applies its own connection request limits independently of the daily limits configured in STACKED.

There are two common restrictions you may encounter:

  1. Weekly connection request limit
  2. Personalised invitation limit on free LinkedIn accounts

Weekly connection request limit

LinkedIn typically limits how many connection requests an account can send each week. The exact allowance can vary by account, and LinkedIn may change these limits.

If STACKED detects that you’ve reached LinkedIn’s weekly invitation limit, it will pause connection request activity for 3 days before trying again.

You don’t need to increase your STACKED daily limit - doing so cannot override a restriction imposed by LinkedIn.


Personalised invitation limit on free LinkedIn accounts

Free LinkedIn accounts can typically add a personalised message to only a limited number of connection requests each month - often around 5–20 personalised invitations.

Once this allowance has been reached, LinkedIn prevents additional connection requests from including a personalised message until the allowance resets.

This is a LinkedIn restriction, so STACKED cannot bypass it.



If personalised connection requests are an important part of your lead generation workflow, consider upgrading from a free LinkedIn account to a paid LinkedIn plan, which provides greater flexibility for prospecting and outreach.


Still not sure why invitations aren’t being sent?

Check Queued Activity and Activity Log in STACKED.

Queued Activity can help you determine whether connection requests are still waiting to be processed, while the Activity Log can show whether an attempted action failed and provide additional information about the reason.

If connection requests work when sent manually on LinkedIn but continue to fail in STACKED, contact our support team at info@dux-soup.com.