A group representing nightclub owners said the Scottish Vaccine Passport app was “unsuitable” and caused “confusion and confusion” on the first weekend.
The scheme officially started early on Friday, but enforcement will not start until October 18.
The club is required to check the customer’s vaccine status before the customer enters.
The NHS Scotland Covid Status app was released on Thursday, but due to technical issues many users were unable to access vaccine certification.
The government said the delay in enforcement meant that no one should leave the nightclub door this weekend.
On Saturday, the Night Time Industries Association (NTIA) said venues across Scotland reported “a high level of customer dissatisfaction with the lack of information from the government and the chaotic deployment of the app.”
In addition, “Scottish apps have become so clear that they are simply unsuitable, and the vast majority of people are repeatedly experiencing problems registering and uploading their personal vaccine status to the app.”
Industry groups opposed the introduction of a vaccine passport scheme that the Scottish government wanted to promote jab intake.
Mike Greaves, chairman of NTIA Scotland and director of Glasgow’s subclub, said many customers are presenting the wrong type of vaccine certification at the door.
He states: “As expected, this false policy deployment caused confusion and confusion last night with only a handful of customers having passports for working apps.
“About 50-60 other people had copies or screenshots of incorrect vaccination information or other fake vaccination evidence.
“Nevertheless, in order to protect the health and safety of our customers and staff, we succeeded in checking the LFT (Immunochromatography) on the day of all participants.
“What a shambles.”
The NTIA appeared in court at the beginning of the week trying to suspend the vaccine passport scheme, but failed.
The Scottish Government said the initial problem with the app was due to the large number of users trying to access the data at once.
The government apologized and said the capacity of the NHS system behind the app has increased.
On Friday, Health Secretary Humza Yusuf said the problem should be resolved “if not within hours, but certainly within days.”
He told Bauer Radio: “Even if you plan to go to a nightclub tonight or soccer on the weekends, do it.
“Of course, we postponed the enforcement of the certification scheme, so to ensure that the system works, that is, to test.
“Therefore, within the limits of regulation, there is nothing that means you have to move away from the nightclub doors or turn tiles this weekend.”
A Scottish government spokeswoman said on Saturday:
“We also provide detailed guidance to the venue and the general public to keep it up to date.”
She continued. “There are no plans to delay the enforcement of the enforcement regulations.
“Since its launch, a total of 167,600 people have downloaded the app.
“We are aware of some toothing problems, mainly due to the amount of requests. The work already done has solved many of the problems people are experiencing.
“We expect the remaining issues to be fixed soon.”