Home / AP4.0 User Manual – Table of Contents / AP4.0 User Manual – 09. Credit Usage / AP4.0 User Manual – 09.3 Extension of Credit Expiry Date Audit Program 4.0 - User Manual Back to Table of Contents Next Page 9. Credit Usage 9.3 Extension of Credit Expiry Dates A. Additional Purchase of 20+ Credits for Extension of Unused Credits Purchase an additional 20 or more credits before the expiry date of your unused credits, then your unused credits’ expiry date will be further extended by One (1) Year.