So NPowerNG has provided the requirement your images must meet for easy upload on the NPVN Portal. According to Npower, your passport and ID card should fit the following requirements:
- Only JPEG, JPG, PNG, (no animated) GIF
- Minimum height of 100px
- Maximum file size 1MB
All you have to do is to download the app, resize your image before uploading on the npvn portal so that you won't have issue of passport and ID card upload and not displaying on your profile.