To download all Receipt records and the PDF attachments from your Salesforce instance, follow these steps:
- Go to Setup Do a Data Export, select include “images. Docs and attachments” as shown below.
- Select only the Receipt Object
- Click Start Export
- You will be emailed upon completion with a link to download the file within 72hours
An important note is that the attachments do not have the proper filename or extension. You can rename all the files to restore the files as they were
Follow the instruction on Salesforce Help at https://help.salesforce.com/articleView?id=000007269&type=1 to create a batch file to convert the ID files in the attachments folder into pdf files with the proper receipt names.
Alternatively if you're familiar with the Salesforce Data Loader application when you export attachments they are named with the receipt record Id and the original file name ("Receipt-1234").