Around 100,000 applicants need to be contacted to have their details verified before receiving their High Street Voucher.
The Department for the Economy said it has begun issuing emails to applicants for the Spend Local scheme whose details could not be automatically verified.
They are urging that an email from noreply@spendlocalni.com is legitimate and not a scam.
The email may arrive into your junk folder. If this has happened, you are asked to move the email into your inbox folder before you access the link to upload your documents.
The email will ask recipients to upload further information to verify their identity. Instructions in the email should be followed carefully.
The Department said some people may have had difficulties uploading their documents due to the file format but this issue has now been resolved. If you are continuing to have issues uploading your documents, you are asked to try a different file format.
Fill in our High Street Voucher Scheme Survey below, or click here.
The public is told to not send the requested verification information to the Spend Local or @Economy_NI email mailboxes or social media accounts – as any documents sent to these mailboxes will not be processed.
You have seven days from receipt of the email to complete the verification required. This applies only to those people who have received the email.
The existing deadline for new applications for a Spend Local card remains midnight on Monday, October 25 for online applications and 6pm the same day for telephone applications.
A spokesperson added: "If you have not yet made your application, please do so without delay. Please also consider if you have friends or family members who may need help with applying.
"To date we have received more than 1.3million applications. Over 1.2million have been verified and we continue to process applications as quickly as possible."
Cards will continue to be issued to successful applicants over the coming weeks.
More information about the scheme and details on how to apply are available at http://www.nidirect.gov.uk/spend-local.
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