Adding Files to Expenses

To upload scanned receipts onto the expense claim.

The process for this is relatively simple however I am concerned that there may be a performance impact if the business starts to upload thousands of picture files.

Can you please provide the advice for uploading these types of files and is there a preferred maximum number per expense claim.

I expect the claims and receipts will need to remain on the system for around 7 years, will that cause an issue?