The fuel giant, one of Nectar's founding sponsors, is launching a three-month project aimed at combating the problem.
The initiative, which will coincide with the first anniversary of the launch of Nectar in mid-September, will involve BP's central marketing team working with individual dealers to bolster their knowledge of and commitment to making Nectar work for the company.
An internal BP memorandum produced after the firm's national forum in May, and obtained by Marketing, underlines the company's concern about Nectar.
"Issuance rates appear to be reducing very slightly month by month, but it is BP's intention to arrest this trend with a number of new ideas and partners," said the document.
It also refers to the development of a "staff-based incentive scheme for our sales people to enable them to be incentivised and increase the effectiveness of Nectar".
A BP spokeswoman said this week that a three-month project would begin next month to work with dealers on Nectar, whose other collection partners include Vodafone, Sainsbury's, Barclaycard, Debenhams and Ford.
"Overall the issuance rate is going up, but some dealers are not doing so well," admitted the spokeswoman.
It is not clear how many dealers have been affected by the decline in the number of Nectar points being issued and BP declined to give further details.