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For an anticipated deficit at year end, a final top-up invoice is issued in February. For more information, see the Deposit Account Balance Statements & Top-Up up Invoices page.

Estimates	2 estimates	February (for April Invoice) June (for August Invoice)
Invoices	2 invoices	April (first invoice) August (mid-year invoice)
Invoices	1 top-up invoice (only for anticipated deficit)	February

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Additions of a new subscription or purchase to your account may lead to a deficit at year-end, and OCLS will issue a top-up invoice.
Cancellations may lead to a surplus in your account which will be substracted from your next biannual invoice (April or Mid-Year). To request a refund instead, please contact the eResources team.

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