On the Swipe dashboard click on "Settings" & then select "Digital Signature"
Click or drag the .PFX file of your digital signature to the highlighted area below.
Once selected, confirm by clicking on upload.
Congratulations! You have successfully uploaded your digital signature on Swipe.
Select the invoice you want to digitally sign and click on the respective action button.
Now, under "Actions" select the digital sign PDF from the dropdown.
A pop-up appears asking for authentication. Fill in your password details and click on "Get Signed Document"
A digitally singed PDF file of your invoice will be downloaded successfully.