This recipe is written by Kingdom First Solutions on behalf of New Life Church (Pestigo, WI). They contacted us wanting to add parent's mobile phone numbers to their check-in labels and wanting to make sure the solution was shared with the community.

For legacy check-in:

• Go to Admin Tools > Check-in > Label Merge Fields
• Click the plus sign on the grid to add a merge field
• Create the Parent Phone Numbers merge field

• Use the following lava as the MergeField

{% assign parents = Person | Parents %}{% for parent in parents %}{{ parent.NickName }}: {{ parent | PhoneNumber:'Mobile' }}  {% endfor %}

• Go to Admin Tools > Check-In > Check-in Labels and choose the label you want to add the field to.
• Under Merge Codes, add a new code with P as the code and Parent Phone Numbers as the field type.

• Edit the label contents
• For this example, I used the Core Child Label (Icon).
• Modify the ZPL to include your merge field. I modified line 16 and added line 17

^FB330,2,0,L^FT8,367^A0N,28,28^FH\^FD9^FS
^FB330,2,0,L^FT8,412^A0N,28,28^FH\^FDP^FS

• Save your label. You may have to adjust ZPL if you have modified the label.

For Next Gen Check-in:

• Go to Admin Tools > Check-In > Next-gen Labels
• If you haven't already, you will need to create a custom label. The core labels cannot be modified.
• Go into Label Designer
• Add a Text control to your label
• Set the Placeholder Text, Font Size, etc for your field
• 
• Choose Dynamic Text and click Edit Lava Template
• Use the following lava to add Parent Phone Numbers to your label

{% assign parents = Person | Parents %}{% for parent in parents %}{{ parent.NickName }}: {{ parent | PhoneNumber:'Mobile' }}  {% endfor %}

• Save your Label

Feel free to reach out if you have any problems with this recipe.