On Friday, the chain closed all remaining 187 shops with the loss of 1,370 jobs as the 78-year-old business ceased trading, just days after falling into administration.
Five of the 192 shops that were trading at the end of 2012, closed after Christmas.
A further '150' people are expected to be made jobless at the company's head office in Leicester, according to accountants PwC who are acting as administrators.
A statement posted on the Jessops website warns: ‘Customers who have ordered and paid for all or part of their stock – either in store or online – will not receive their stock purchase.
‘Customers who have paid using credit cards should contact their credit card company to try and seek resolution to this matter.'
Customers who are owed money by Jessops – such as in the form of unredeemed gift cards and vouchers, or courses paid for in advance – will also lose out.
They have been told to register as an 'unsecured creditor' with the administrators, using the PwC website at www.pwc.co.uk/jessops
Administrators have set up a Jessops Group Limited helpline which can be reached on 0113 289 4422.
Meanwhile, Nikon has moved to reassure customers that it is ‘actively working with administrators and plans to undertake all outstanding repairs as quickly as possible'.
In a statement, the firm added: ‘Nikon UK can confirm that we will also be honouring any repairs under Jessops' Photo + extended warranty scheme.' For details call 0330 123 0928.
To read the administrators' advice to Jessops customers click HERE