Counterfeit or badly damaged coins create smaller individual losses than counterfeit banknotes, but a high-volume cash business can process thousands of coins every week. The right control is usually a mix of staff awareness, suitable counting equipment and a clear route for coins that machines reject.
Use coin equipment that can authenticate as well as count
The Royal Mint operates a Coin Checking and Validation Framework for high-speed coin-processing machines. It publishes information about models and software versions that meet its testing standards so businesses can make informed equipment choices.
A fast counter that only sorts by size or weight can still create risk if it is not designed for current counterfeit detection. Check the model, software and maintenance regime when cash volumes justify automated processing.
Train staff to separate unusual coins rather than forcing them through the till
Employees handling cash should know what current UK circulating coins look and feel like and should set aside visibly altered, suspicious or machine-rejected items for supervisor review. They should not repeatedly feed a rejected coin through a machine until it passes.
Keep the process simple. A supermarket or arcade may need formal machine procedures, while a café can use basic visual checks and controlled banking. The level of control should reflect coin volume and exposure.
Damaged or garbled coins do not automatically have refundable value
The Royal Mint's current Garbled Coin Policy says it does not accept circulation coins directly from individual businesses or the public. Coins are normally returned through the UK banking system, and banks or Post Offices decide whether to accept them under their own processes.
The Royal Mint also says deliberately or recklessly damaged coins are not reimbursed. Do not treat every rejected coin as recoverable cash. Segregate it until the bank confirms whether it can be deposited or returned through the appropriate route.
Reconcile coin deposits to counted cash before it leaves the premises
Use coin bags, denomination counts and deposit records that match the till or cash-office total. If a bank or Post Office rejects coins, record the difference against the original bag rather than letting the shortage appear days later without explanation.
For cash-collection services, keep sealed-bag identifiers and collector receipts. Coin-heavy businesses can lose more through weak counting and reconciliation than through sophisticated counterfeit operations, so basic custody controls remain important.
Book confirmed counterfeit or non-recoverable coins as a cash loss
A counterfeit coin has no genuine monetary value. Once the business confirms the item cannot be banked, remove it from the cash balance and record the shortage according to the accounting policy.
Do not hide repeated differences inside a generic cash-over-and-short account without review. A pattern at one till, site or machine can indicate equipment problems, theft or weak acceptance controls.
Review equipment when counterfeit designs or coin specifications change
The Royal Mint's validation framework exists because coin-authentication equipment needs to keep up with current circulating coins and known counterfeits. Check vendor updates and the Royal Mint listing for machines used in higher-volume environments.
Include software version in the asset register for counting equipment. A machine bought five years ago may still function mechanically while its authentication logic is outdated. Maintenance is part of cash control, not just hardware support.
For arcades, laundrettes, vending operators and other coin-heavy businesses, test machines after software updates and after changes to coin designs. A machine that begins rejecting genuine coins creates customer-service and revenue problems, while one that accepts counterfeits transfers loss directly into the cash box.
Keep rejected coins in a labelled container until a supervisor decides whether they can be banked, returned through the banking system or treated as loss. Mixing them back into ordinary till cash only moves the problem to the next employee or bank deposit.
Use coin discrepancies to assess equipment quality. If one site's sorter reports a much higher rejection rate than identical machines elsewhere, inspect calibration and software before blaming customers. A good control separates suspected counterfeit risk from ordinary mechanical misclassification.
For businesses with vending or amusement machines, compare coin rejection with revenue records. A machine that suddenly accepts more cash but the bank deposit contains a higher level of rejected coins can indicate deteriorating validation quality. Maintenance data and cash data should be reviewed together.
Keep overseas coins separate from UK circulation coins. The Royal Mint says overseas coins are not accepted through the UK Garbled Coin Policy. Mixed foreign coins in cash drawers should therefore be removed during reconciliation rather than repeatedly sent back through UK banking channels.
Editorial Verdict
Coin fraud is usually a volume-management problem rather than a single catastrophic loss. Use validated equipment where volumes justify it, isolate rejected coins and reconcile every cash bag to the bank deposit.
Do not assume the Royal Mint will reimburse every damaged coin. Individual businesses normally work through banks or Post Offices, and deliberately damaged coins have no automatic recovery value.
Sources
- Royal Mint, Coin checking and validation in the UK: https://www.royalmint.com/corporate/circulating-coin/coin-checking-and-validation-in-the-uk/
- Royal Mint, UK Garbled Coin Policy: https://www.royalmint.com/aboutus/policies-and-guidelines/uk-garbled-coin-policy/