Some refrigerators have adjustment screws on the lower hinge that can be turned to raise or lower the door for better alignment. For others, you can add plastic washers or shims to the lower hinge pin to help align the doors. Loosening the top hinge screws will often allow the door to be readjusted from side to side (don't forget to retighten the screws after any adjustments are made).
Highly Likely
02 - Kirkland Refrigerator Closing Cam
A refrigerator door closing cam allows the door to rest in place in the open position and to close securely on its own when the door is swung shut. A damaged closing cam could cause the door to be misaligned. Inspect the cam for wear or damage and replace if necessary.
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A refrigerator door closing mechanism allows the door to rest in place in the open position and to close securely on its own when the door is swung shut. A damaged closing mechanism could cause the door to be misaligned. Inspect the mechanism for wear or damage and replace if necessary.
A damaged or bent door hinge could cause the refrigerator door to be misaligned and not close properly. Inspect the hinge for defects and replace if necessary.