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Perpetual CS5.5 License – Activation Refused After Server Changes

New Here ,
Nov 24, 2025 Nov 24, 2025

Hello,
I am asking for help with a perpetual Adobe Creative Suite 5.5 license (purchased in 2012) that I can no longer activate.

I still have:

- the original Certificate of Authenticity,

- my original serial number,

- the original invoice from the reseller,

and the software was successfully used in the past.


Adobe Support informed me that my reseller “is not on the current list of official distributors”. However, the purchase was made 12 years ago, the reseller no longer exists today, and activation fails only because Adobe’s activation servers for CS products were discontinued.

I kindly ask for review from the Licensing Specialist team or for the case to be escalated.
This is not a subscription issue – I only need help with activating a legitimate perpetual license that Adobe’s server shutdown rendered inactive.

Is it possible to have the serial number checked manually or to receive an offline activation exception?

Thank you very much.

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Activation
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Community Expert ,
Nov 24, 2025 Nov 24, 2025
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Community Expert ,
Nov 24, 2025 Nov 24, 2025

Did you deactivate it on the old computer(s)?

If you are getting an error message, what does it say?

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New Here ,
Nov 27, 2025 Nov 27, 2025

Its still running on my old computer. Installation goes excellent, just when runn any software of the suite, the system want my serial number (which was ok just few years ago). And when I put my official bought seriak number, it checks it as invalid. 

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Community Expert ,
Nov 27, 2025 Nov 27, 2025

the installation file and serial number don't match.

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New Here ,
Nov 27, 2025 Nov 27, 2025

And what can I do with that? This used to be no problem before. 

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Community Expert ,
Nov 27, 2025 Nov 27, 2025

go to your adobe account and download the installation file and copy your serial number.

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Community Expert ,
Nov 27, 2025 Nov 27, 2025
quote

 it checks it as invalid. 


By @veko22

 

What is the exact wording?

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New Here ,
Nov 27, 2025 Nov 27, 2025

<removed-kglad>

it is in czech language: this is not the serial number valid for this product

 

<removed-kglad>

 

My adobe acount - registered product

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Community Expert ,
Nov 27, 2025 Nov 27, 2025

again....

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New Here ,
Nov 27, 2025 Nov 27, 2025

I donwloaded files froma my adobe acount and tried to install again. The same trouble. It is registred under this number and has worked for many years. I bought it regulary, I have an invoice and Adobe Certificate. Now the support tries to uses the argument that the reseller is not in their database. It is 12 years ago and I think It´s not my trouble. I should have permission for endless use of my licence, I think. I dont need the support or aktualisation.

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Community Expert ,
Nov 27, 2025 Nov 27, 2025

was the serial number listed at the same account?

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New Here ,
Nov 27, 2025 Nov 27, 2025

Yes

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Community Expert ,
Nov 27, 2025 Nov 27, 2025

was it 6 groups of 4 numbers?

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New Here ,
Nov 27, 2025 Nov 27, 2025

Yes, you see on the image I inserted

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Community Expert ,
Nov 24, 2025 Nov 24, 2025

CS5 is 15-year-old, unsupported software.  Nobody can help you recover a revoked license.  Sorry. 

 

MODERN OPTIONS:
==============
FREE Acrobat Reader
https://www.adobe.com/acrobat/pdf-reader.html

FREE Online PDF Editor
https://www.adobe.com/acrobat/online/pdf-editor.html\

Paid Acrobat (Standard, Pro or Studio)
https://www.adobe.com/acrobat/pricing/compare-versions.html

Photoshop Elements or Premiere Elements (3 year license).
https://www.adobe.com/products/photoshop-elements.html

Creative Cloud Annual Photography plan. 
https://www.adobe.com/creativecloud/photography.html

FREE or Paid Adobe Express
https://helpx.adobe.com/express/using/express-overview.html

Creative Cloud Bundles & Single Apps for mobile, web & desktops
https://www.adobe.com/creativecloud/plans.html

Good luck.

 

Nancy O'Shea— Product User, Community Expert & Moderator
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New Here ,
Nov 27, 2025 Nov 27, 2025

I dont agree. I bought it in 2012 and spent a lot of money for that. I bought a permanet licence and I have right to use it forever. Nobody can cancel my validations just for fun. I dont need support, installation is gping well. I just need to validate my serial. 

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Community Expert ,
Nov 24, 2025 Nov 24, 2025

what problem are you seeing when trying to activate?

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New Here ,
Nov 27, 2025 Nov 27, 2025

Invalid serial number. Installation succesfull.

Few years ago was serial number ok. 

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New Here ,
Nov 27, 2025 Nov 27, 2025

I have now downloaded my product from my Adobe account, as you recommended. I tried reinstalling it using the serial number assigned to the product (both in my Adobe account and on the certificate). Now, during installation, it says that this serial number does not match the product. I also went through the online serial number validation wizard, and it said my number was invalid.

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New Here ,
Nov 27, 2025 Nov 27, 2025

I have an open support ticket where they keep telling me that my seller is not trustworthy to them—they don't have him in their database. They keep offering me a subscription upgrade. He used to be trustworthy to them, and I did everything I could to legally obtain a product worth over $1,000. I would never buy anything so expensive from someone untrustworthy. This whole problem and their approach give me the impression that they just want to make money off me and are ignoring the law. I bought a lifetime license, officially, I have the documents to prove it. The fact that someone is not in their database now is not my problem. Let them show me the database from 2012, when I bought the product.

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Community Expert ,
Nov 28, 2025 Nov 28, 2025

if you saw an invalid serial number you either made an error when entering the number OR you have the wrong installer.  details:

 

assuming you're using a valid adobe serial number (6 groups of 4 numbers), you have a mismatch between your installation file and serial number. ie, you can have a valid serial number, but if it's for program A and your installation file is for program B, you will see an invalid serial number message.

 

common mismatches are language/region (eg, serial number is for western europe and installation file is eastern europe), platform (eg, serial number is for a mac and installation file is win), license type (eg, education vs enterprise vs individual). and one of the most common is using a program installation file with a suite's serial number. eg, using a cs6 suite serial number with a photoshop cs6 installation file. that won't work even though photoshop is included in that suite.

 

you must use the (correct) suite's installation file (and you can choose to only install one program from the suite). here's official info about that error, http://helpx.adobe.com/creative-suite/kb/error-serial-number-valid-product.html

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Community Expert ,
Nov 28, 2025 Nov 28, 2025

also, posting your serial number in public will trigger a revocation of that serial number.

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New Here ,
Nov 28, 2025 Nov 28, 2025

Yes that was not very smart from me to post the  picture here. I can not find the way how to delete it 🙈

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Community Expert ,
Nov 28, 2025 Nov 28, 2025

i already removed it.

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