TTC Metropasses won’t be in the mail this month.

The transit agency announced Tuesday it has decided not to send out August transit passes to its 53,000 Metropass Discount Plan subscribers, “due to the uncertainty surrounding a possible labour disruption at Canada Post.”

The TTC is advising customers who subscribe to the plan to purchase passes at subway stations or one of 1,500 third-party vendors. The commission won’t charge subscribers for next month’s pass, and instead on Aug. 1 will credit their accounts with an amount equivalent to the discount they receive — $11.75 for adult subscribers, and $9.25 for seniors and students.

Metropasses will be available at retail outlets starting July 18, at subway station vending machines July 21, and collector booths July 24. The commission will distribute additional passes to these locations in order to meet demand.

Canada Post and its union have been locked in contract negotiations since April. The talks have recently improved, and on Sunday Canada Post withdrew its threat of a lockout, at least for the time being.

But TTC spokesman Brad Ross said the agency’s deadline for readying the passes for mailing was Tuesday, and it couldn’t risk a lockout or strike.

“With a potential labour disruption at Canada Post still a possibility, mailing the August Metropass posed a risk of passes not reaching TTC customers in time for use next month,” the commission said in a news release.

Under the discount plan, TTC customers sign up to buy passes for one year using with pre-authorized monthly payments. Adult subscribers pay $129.75 a month, down from the regular price of $141.50. Students and seniors pay $102.75, reduced from $112.

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