# Error message on "Alternative process for individuals" **URL:** \ **Category:** EFILE\ **Created:** [December 3, 2025, 6:08pm UTC](https://www.protaxcommunity.com/t/error-message-on-alternative-process-for-individuals/11611 "2025-12-03T18:08:39Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![chantal](https://avatars.discourse-cdn.com/v4/letter/c/85f322/32.png) [@chantal](https://www.protaxcommunity.com/u/chantal)\ **Post date:** [December 3, 2025, 6:08pm UTC](https://www.protaxcommunity.com/t/error-message-on-alternative-process-for-individuals/11611/1 "2025-12-03T18:08:39Z")
When I try to submit an authorization request through Represent a Client, as per CRA’s “Alternative process for individuals” (ie. use NOA info instead of their My Account), I am getting this error which I think is related to the SIN: Field is not valid for this service. (T906) Anyone encountered this or know how to resolve? (already confirmed that name/SIN is correct) ---
**Author:** ![anni](https://avatars.discourse-cdn.com/v4/letter/a/a87d85/32.png) [@anni](https://www.protaxcommunity.com/u/anni)\ **Post date:** [December 3, 2025, 8:52pm UTC](https://www.protaxcommunity.com/t/error-message-on-alternative-process-for-individuals/11611/2 "2025-12-03T20:52:45Z")
Do you have CRA NOA to confirm the name as CRA has it? and you have their SIN on card or Service Canada letter? (and this is not a first time filer or deceased?) ---
**Author:** ![DMS](https://avatars.discourse-cdn.com/v4/letter/d/ecb155/32.png) [@DMS](https://www.protaxcommunity.com/u/DMS)\ **Post date:** [April 29, 2026, 2:10am UTC](https://www.protaxcommunity.com/t/error-message-on-alternative-process-for-individuals/11611/3 "2026-04-29T02:10:35Z")
Curious what the solution was to this issue if you solved it. I’m running into the same issue trying to generate an authorization form for a client to sign. “Field is not valid for this service. (T906)” when I try to move beyond the SIN and name section. ---
**Author:** ![Nezzer](https://sea2.discourse-cdn.com/flex016/user_avatar/www.protaxcommunity.com/nezzer/32/3845_2.png) [@Nezzer](https://www.protaxcommunity.com/u/Nezzer)\ **Post date:** [April 29, 2026, 3:07pm UTC](https://www.protaxcommunity.com/t/error-message-on-alternative-process-for-individuals/11611/4 "2026-04-29T15:07:30Z")
Yes. I posted about that myself: > [@Can't get RAC to generate Auth Rep form](https://www.protaxcommunity.com/t/cant-get-rac-to-generate-auth-rep-form/12273): > > Strange error today when trying to get authorization form online: This comes up at the point where you enter the client’s SIN and name (so, the very start of the process). I select “Certified by…Taxpayer” (see below), then click Next, and the error message appears at the top - above the entry fields. Anyone else seeing this? Tried several times since - same error. I have had no trouble generating the form for most people, so I deduce it is something related to this particular person. Maybe CRA has their account locked due to suspected fraud or something…? ---
**Author:** ![nevans](https://avatars.discourse-cdn.com/v4/letter/n/b77776/32.png) [@nevans](https://www.protaxcommunity.com/u/nevans)\ **Post date:** [May 2, 2026, 11:51am UTC](https://www.protaxcommunity.com/t/error-message-on-alternative-process-for-individuals/11611/5 "2026-05-02T11:51:29Z")
So I had this issue with a new client and thee way I resolved it was that CRA wanted the middle initial along with the first name. On the NOA it showed the first name middle initial then last name, kept on getting that error message and couldn’t get past that screen. When I added the middle initial it finally worked. ---
**Author:** ![Nezzer](https://sea2.discourse-cdn.com/flex016/user_avatar/www.protaxcommunity.com/nezzer/32/3845_2.png) [@Nezzer](https://www.protaxcommunity.com/u/Nezzer)\ **Post date:** [May 2, 2026, 6:19pm UTC](https://www.protaxcommunity.com/t/error-message-on-alternative-process-for-individuals/11611/6 "2026-05-02T18:19:05Z")
In my case, that didn’t work. I tried any and all variations of the name - with and without middle name, with and without middle initial, etc. Nothing worked. Ended up paper filing this one.