{"id":2308,"date":"2026-04-28T08:38:00","date_gmt":"2026-04-28T03:08:00","guid":{"rendered":"https:\/\/www.smsgatewaycenter.com\/blog\/?post_type=docs&#038;p=2308"},"modified":"2026-04-28T08:38:00","modified_gmt":"2026-04-28T03:08:00","password":"","slug":"what-does-invalid_sub-invalid-user-mean","status":"publish","type":"docs","link":"https:\/\/www.smsgatewaycenter.com\/blog\/kb\/what-does-invalid_sub-invalid-user-mean\/","title":{"rendered":"What does INVALID_SUB (Invalid User) mean?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The\u00a0<strong>recipient number is invalid<\/strong> &#8211; for example wrong format, too short\/long, or not a valid mobile number. The message was not sent to this number.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What you can do:<\/strong>&nbsp;Check number format (e.g. include country code, no spaces\/letters). Clean your list to remove invalid entries.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The\u00a0recipient number is invalid &#8211; for example wrong format, too short\/long, or not a valid mobile number. The message was not sent to this number. What you can do:&nbsp;Check number format (e.g. include country code, no spaces\/letters). Clean your list to remove invalid entries.<\/p>\n","protected":false},"author":118,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"doc_category":[1965],"doc_tag":[],"class_list":["post-2308","docs","type-docs","status-publish","hentry","doc_category-errors-error-codes"],"year_month":"2026-06","word_count":50,"total_views":0,"reactions":{"happy":0,"normal":0,"sad":0},"author_info":{"name":"admin","author_nicename":"admin","author_url":"https:\/\/www.smsgatewaycenter.com\/blog\/author\/admin\/"},"doc_category_info":[{"term_name":"Errors &amp; Error Codes","term_url":"https:\/\/www.smsgatewaycenter.com\/blog\/kb-cat\/errors-error-codes\/"}],"doc_tag_info":[],"_links":{"self":[{"href":"https:\/\/www.smsgatewaycenter.com\/blog\/wp-json\/wp\/v2\/docs\/2308","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.smsgatewaycenter.com\/blog\/wp-json\/wp\/v2\/docs"}],"about":[{"href":"https:\/\/www.smsgatewaycenter.com\/blog\/wp-json\/wp\/v2\/types\/docs"}],"author":[{"embeddable":true,"href":"https:\/\/www.smsgatewaycenter.com\/blog\/wp-json\/wp\/v2\/users\/118"}],"replies":[{"embeddable":true,"href":"https:\/\/www.smsgatewaycenter.com\/blog\/wp-json\/wp\/v2\/comments?post=2308"}],"version-history":[{"count":0,"href":"https:\/\/www.smsgatewaycenter.com\/blog\/wp-json\/wp\/v2\/docs\/2308\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.smsgatewaycenter.com\/blog\/wp-json\/wp\/v2\/media?parent=2308"}],"wp:term":[{"taxonomy":"doc_category","embeddable":true,"href":"https:\/\/www.smsgatewaycenter.com\/blog\/wp-json\/wp\/v2\/doc_category?post=2308"},{"taxonomy":"doc_tag","embeddable":true,"href":"https:\/\/www.smsgatewaycenter.com\/blog\/wp-json\/wp\/v2\/doc_tag?post=2308"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}