The DTFS was removed from the Scottish charity register in March 2007 after the regulator failed to find any evidence that it was still operating.
However, the OSCR has since received complaints that the DTFS is still collecting funds in Glasgow pubs with collection tins bearings its former charity number.
The organisation has ignored repeated warnings not to represent itself as a charity, and has declined the OSCR's invitation to re-apply for charitable status.
Last week, the OSCR said it had issued a formal direction to the DTFS and its manager, Brian McKigen, to stop representing the organisation as a charity.
Breach of the order is a criminal offence that could lead to a fine of up to £5,000 and up to six months in prison.
Any information the OSCR receives about breaches will be sent to the Scottish procurator fiscal.
Third Sector was unable to contact anyone at the DTFS for comment.