Key elements of the communication, and a suggested template, is outlined below:

ACTION REQUIRED PRODUCT WITHDRAWAL/RECALL [Specify] NOTIFICATION
Product Name and Description (including pack size):
Product Identifying Code (eg EAN Code):
Product type:
Reason for notification:
Type of packaging, possibly including wholesale case or traded unit:
Accurate and up to date pictures of product and location of batch code, possibly including pictures of wholesale case or traded unit:
Full Batch code information: 1. Pack and, where different: 2. Pallet 3. Case 4. Pack
Action required by when: (specify action by customer channel if different)
Contact information:

Dear x

(Company or Brand Name) are currently initiating a Product Withdrawal/Recall* for the Product A 100g. You have been identified as purchasing/receiving the affected products. No other products from Company or Brand Name are affected by this withdrawal/recall*.

We apologise for the inconvenience caused.

* Select appropriate option

Product Name and Description (including pack size):
Product Identifying Code (and EAN/barcode information if appropriate):
Supplier:
Pack Size:
Pictures of product, including wholesale case:
Best Before/Use by Date:
Batch Code (and location on case/consumer unit):
Reason for withdrawal/recall:
Action required by when: