https://www.infopathdev.com:443/forums/39.aspxNew to InfoPath? Search to see if your question has already been answered. If it has not, then ask it here or the appropriate topic forum.enCommunityServer 2007 SP3 (Build: 31118.962)https://www.infopathdev.com:443/forums/thread/93953.aspxTue, 29 Oct 2013 16:13:55 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:93953wilkies0106aw0https://www.infopathdev.com:443/forums/thread/93953.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=39&PostID=93953<p>&nbsp;Does this help - http://www.regexlib.com/REDetails.aspx?regexp_id=527&amp;AspxAutoDetectCookieSupport=1 or http://www.etl-tools.com/regular-expressions/is-uk-national-insurance-number.html<br /></p>https://www.infopathdev.com:443/forums/thread/93941.aspxTue, 29 Oct 2013 10:27:41 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:93941bjornatron0https://www.infopathdev.com:443/forums/thread/93941.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=39&PostID=93941<p>Hi all,</p><p>I&#39;m looking for some help with validating a correctly formatted&nbsp;string to the UK National&nbsp;Insurance number format:&nbsp;</p><p>The basic format is : Two prefix letters, six digits and one suffix letter example. <strong>AB123456C</strong></p><p>Often, the number is printed/entered with spaces to pair off the digits, like this: AB 12 34 56 C</p><p>Some specific rules for this format:</p><ul><li><div>Neither of the first two letters can be D, F, I, Q, U or V. The second letter also cannot be O.</div></li><li><div>The prefixes BG, GB, NK, KN, TN, NT and ZZ are not allocated.</div></li><li><div>The suffix letter is either A, B, C or D</div></li></ul><p>I&#39;ve used the following custom pattern just to get the basic format covered: \p{L}\p{L}\d\d\d\d\d\d\p{L} but wondered if anyone could help &#39;fine-tune&#39; this for me? Also if we could cater for potential spaces would be ideal.</p><p>Many thanks for any help/guidance. :)</p><p>Bjorn</p>