Donors can donate by PayPal for personal cause campaigns only (not charity campaigns).
PayPal buttons are displayed on Fundraising Pages when they are generated by the campaign creator.
Campaign creators are offered the PayPal option when setting up their campaign.
However to add a PayPal button later :
2. Go to Fundraising & Crowdfunding Campaigns
3. Click "manage banking and PayPal"
4. Would you like to provide a PayPal donation option for your donors. Select YES
5. Enter your verified PayPal email and the precise name associated with it. Make sure your PayPal email is verified, a PayPal button cannot be generated if your PayPal email is not verified.