Mockup Credit for images 1 and 2 - 

Image by <a href="https://www.freepik.com/free-photo/still-life-object-showing-it-s-girl_94964355.htm#query=greeting%20card%20mockup&position=18&from_view=keyword&track=ais&uuid=77996d01-8cff-4129-a460-12612e0d5890">Freepik</a>

Mockup Credit for Image 3

<a href="https://www.freepik.com/free-psd/greeting-cards-template-design_1000470.htm#query=greeting%20card%20mockup&position=8&from_view=keyword&track=ais&uuid=795f546e-35d7-4f88-9336-ff8db4cf3b94">Image by marie_smith</a> on Freepik