Yes, if you only have guest IDs, then you can create a Segment to target those guests.
- Head to Guests > Segments
- Create a new Custom List Segment
- Paste the guest IDs in the list box
NOTE: If you have more than 2,000 guest IDs, then you will need to upload a CSV with a single column of guest IDs and no header. As a workaround, you can add 2,000 guests to the list at a time, save, and then repeat with another 2,000 guests.
For information on how to upload this as a CSV follow the steps in this link:
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)