The function of combining cards of duplicated guests (available only in the full version of Shelter).
Go to the "Guest List" module:
In the filter on the left, first enter the desired surname:
Then select the "All guests" item in the filter and set the maximum number of entries, for example, 10000:
We tick the same guest cards - you can compare them by full name, dates of birth, phone or mail. The guest whose card will become the main one should remain highlighted:
After the necessary cards are marked, click the "Guest Card" button on the top panel (down arrow) and select the "Unite guests" item:
A window will appear with information about which card will become the main one when combined. Check the information and click "Yes":
A window will appear with the main guest's card open. In the window, click "Save":
The guests are united: